diff --git a/Library/Homebrew/cask.rb b/Library/Homebrew/cask.rb
index 2f9df69d02..d3e6d8ebae 100644
--- a/Library/Homebrew/cask.rb
+++ b/Library/Homebrew/cask.rb
@@ -8,7 +8,6 @@ require "cask/cache"
 require "cask/cask_loader"
 require "cask/cask"
 require "cask/caskroom"
-require "cask/cmd"
 require "cask/config"
 require "cask/exceptions"
 require "cask/denylist"
diff --git a/Library/Homebrew/cask/cmd.rb b/Library/Homebrew/cask/cmd.rb
deleted file mode 100644
index b2db671417..0000000000
--- a/Library/Homebrew/cask/cmd.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-# typed: true
-# frozen_string_literal: true
-
-require "optparse"
-require "shellwords"
-
-require "cli/parser"
-require "extend/optparse"
-
-require "cask/config"
-
-require "cask/cmd/abstract_command"
-require "cask/cmd/install"
-
-module Cask
-  # Implementation of the `brew cask` command-line interface.
-  #
-  # @api private
-  class Cmd
-    extend T::Sig
-
-    include Context
-
-    def self.parser(&block)
-      Homebrew::CLI::Parser.new do
-        instance_eval(&block) if block
-
-        cask_options
-      end
-    end
-  end
-end
diff --git a/Library/Homebrew/cask/cmd/abstract_command.rb b/Library/Homebrew/cask/cmd/abstract_command.rb
deleted file mode 100644
index 23e972087c..0000000000
--- a/Library/Homebrew/cask/cmd/abstract_command.rb
+++ /dev/null
@@ -1,98 +0,0 @@
-# typed: false
-# frozen_string_literal: true
-
-require "search"
-
-module Cask
-  class Cmd
-    # Abstract superclass for all Cask implementations of commands.
-    #
-    # @api private
-    class AbstractCommand
-      extend T::Sig
-      extend T::Helpers
-
-      OPTIONS = [
-        [:switch, "--[no-]binaries", {
-          description: "Disable/enable linking of helper executables (default: enabled).",
-          env:         :cask_opts_binaries,
-        }],
-        [:switch, "--require-sha",  {
-          description: "Require all casks to have a checksum.",
-          env:         :cask_opts_require_sha,
-        }],
-        [:switch, "--[no-]quarantine", {
-          description: "Disable/enable quarantining of downloads (default: enabled).",
-          env:         :cask_opts_quarantine,
-        }],
-      ].freeze
-
-      def self.parser(&block)
-        Cmd.parser do
-          instance_eval(&block) if block
-
-          OPTIONS.map(&:dup).each do |option|
-            kwargs = option.pop
-            send(*option, **kwargs)
-          end
-        end
-      end
-
-      sig { returns(String) }
-      def self.command_name
-        @command_name ||= name.sub(/^.*:/, "").gsub(/(.)([A-Z])/, '\1_\2').downcase
-      end
-
-      sig { returns(T::Boolean) }
-      def self.abstract?
-        name.split("::").last.match?(/^Abstract[^a-z]/)
-      end
-
-      sig { returns(T::Boolean) }
-      def self.visible?
-        true
-      end
-
-      sig { returns(String) }
-      def self.help
-        parser.generate_help_text
-      end
-
-      sig { returns(String) }
-      def self.short_description
-        description[/\A[^.]*\./]
-      end
-
-      def self.run(*args)
-        new(*args).run
-      end
-
-      attr_reader :args
-
-      def initialize(*args)
-        @args = self.class.parser.parse(args)
-      end
-
-      private
-
-      def casks(alternative: -> { [] })
-        return @casks if defined?(@casks)
-
-        @casks = args.named.empty? ? alternative.call : args.named.to_casks
-      rescue CaskUnavailableError => e
-        reason = [e.reason, *suggestion_message(e.token)].join(" ")
-        raise e.class.new(e.token, reason)
-      end
-
-      def suggestion_message(cask_token)
-        matches = Homebrew::Search.search_casks(cask_token)
-
-        if matches.one?
-          "Did you mean '#{matches.first}'?"
-        elsif !matches.empty?
-          "Did you mean one of these?\n#{Formatter.columns(matches.take(20))}"
-        end
-      end
-    end
-  end
-end
diff --git a/Library/Homebrew/cask/cmd/install.rb b/Library/Homebrew/cask/cmd/install.rb
deleted file mode 100644
index c4cbab03ef..0000000000
--- a/Library/Homebrew/cask/cmd/install.rb
+++ /dev/null
@@ -1,116 +0,0 @@
-# typed: false
-# frozen_string_literal: true
-
-require "cask_dependent"
-
-module Cask
-  class Cmd
-    # Cask implementation of the `brew install` command.
-    #
-    # @api private
-    class Install < AbstractCommand
-      extend T::Sig
-
-      OPTIONS = [
-        [:switch, "--adopt", {
-          description: "Adopt existing artifacts in the destination that are identical to those being installed. " \
-                       "Cannot be combined with --force.",
-        }],
-        [:switch, "--skip-cask-deps", {
-          description: "Skip installing cask dependencies.",
-        }],
-        [:switch, "--zap", {
-          description: "For use with `brew reinstall --cask`. Remove all files associated with a cask. " \
-                       "*May remove files which are shared between applications.*",
-        }],
-      ].freeze
-
-      def self.parser(&block)
-        super do
-          switch "--force",
-                 description: "Force overwriting existing files."
-
-          OPTIONS.map(&:dup).each do |option|
-            kwargs = option.pop
-            send(*option, **kwargs)
-          end
-
-          instance_eval(&block) if block
-        end
-      end
-
-      sig { void }
-      def run
-        self.class.install_casks(
-          *casks,
-          binaries:       args.binaries?,
-          verbose:        args.verbose?,
-          force:          args.force?,
-          adopt:          args.adopt?,
-          skip_cask_deps: args.skip_cask_deps?,
-          require_sha:    args.require_sha?,
-          quarantine:     args.quarantine?,
-          quiet:          args.quiet?,
-          zap:            args.zap?,
-        )
-      end
-
-      def self.install_casks(
-        *casks,
-        verbose: nil,
-        force: nil,
-        adopt: nil,
-        binaries: nil,
-        skip_cask_deps: nil,
-        require_sha: nil,
-        quarantine: nil,
-        quiet: nil,
-        zap: nil,
-        dry_run: nil
-      )
-
-        options = {
-          verbose:        verbose,
-          force:          force,
-          adopt:          adopt,
-          binaries:       binaries,
-          skip_cask_deps: skip_cask_deps,
-          require_sha:    require_sha,
-          quarantine:     quarantine,
-          quiet:          quiet,
-          zap:            zap,
-        }.compact
-
-        options[:quarantine] = true if options[:quarantine].nil?
-
-        if dry_run
-          if (casks_to_install = casks.reject(&:installed?).presence)
-            ohai "Would install #{::Utils.pluralize("cask", casks_to_install.count, include_count: true)}:"
-            puts casks_to_install.map(&:full_name).join(" ")
-          end
-          casks.each do |cask|
-            dep_names = CaskDependent.new(cask)
-                                     .runtime_dependencies
-                                     .reject(&:installed?)
-                                     .map(&:to_formula)
-                                     .map(&:name)
-            next if dep_names.blank?
-
-            ohai "Would install #{::Utils.pluralize("dependenc", dep_names.count, plural: "ies", singular: "y",
-                                                    include_count: true)} for #{cask.full_name}:"
-            puts dep_names.join(" ")
-          end
-          return
-        end
-
-        require "cask/installer"
-
-        casks.each do |cask|
-          Installer.new(cask, **options).install
-        rescue CaskAlreadyInstalledError => e
-          opoo e.message
-        end
-      end
-    end
-  end
-end
diff --git a/Library/Homebrew/cmd/outdated.rb b/Library/Homebrew/cmd/outdated.rb
index becc267a2d..677d2d6878 100644
--- a/Library/Homebrew/cmd/outdated.rb
+++ b/Library/Homebrew/cmd/outdated.rb
@@ -4,7 +4,6 @@
 require "formula"
 require "keg"
 require "cli/parser"
-require "cask/cmd"
 require "cask/caskroom"
 require "api"
 
diff --git a/Library/Homebrew/cmd/reinstall.rb b/Library/Homebrew/cmd/reinstall.rb
index 507dbb61d6..1aa5c77e51 100644
--- a/Library/Homebrew/cmd/reinstall.rb
+++ b/Library/Homebrew/cmd/reinstall.rb
@@ -8,7 +8,6 @@ require "install"
 require "reinstall"
 require "cli/parser"
 require "cleanup"
-require "cask/cmd"
 require "cask/utils"
 require "cask/macos"
 require "cask/reinstall"
@@ -75,8 +74,29 @@ module Homebrew
       formula_options
       [
         [:switch, "--cask", "--casks", { description: "Treat all named arguments as casks." }],
-        *Cask::Cmd::AbstractCommand::OPTIONS.map(&:dup),
-        *Cask::Cmd::Install::OPTIONS.map(&:dup),
+        [:switch, "--[no-]binaries", {
+          description: "Disable/enable linking of helper executables (default: enabled).",
+          env:         :cask_opts_binaries,
+        }],
+        [:switch, "--require-sha",  {
+          description: "Require all casks to have a checksum.",
+          env:         :cask_opts_require_sha,
+        }],
+        [:switch, "--[no-]quarantine", {
+          description: "Disable/enable quarantining of downloads (default: enabled).",
+          env:         :cask_opts_quarantine,
+        }],
+        [:switch, "--adopt", {
+          description: "Adopt existing artifacts in the destination that are identical to those being installed. " \
+                       "Cannot be combined with --force.",
+        }],
+        [:switch, "--skip-cask-deps", {
+          description: "Skip installing cask dependencies.",
+        }],
+        [:switch, "--zap", {
+          description: "For use with `brew reinstall --cask`. Remove all files associated with a cask. " \
+                       "*May remove files which are shared between applications.*",
+        }],
       ].each do |args|
         options = args.pop
         send(*args, **options)
diff --git a/Library/Homebrew/cmd/upgrade.rb b/Library/Homebrew/cmd/upgrade.rb
index 0146f38aae..c30792e1c3 100644
--- a/Library/Homebrew/cmd/upgrade.rb
+++ b/Library/Homebrew/cmd/upgrade.rb
@@ -5,7 +5,6 @@ require "cli/parser"
 require "formula_installer"
 require "install"
 require "upgrade"
-require "cask/cmd"
 require "cask/utils"
 require "cask/upgrade"
 require "cask/macos"
@@ -100,7 +99,18 @@ module Homebrew
         [:switch, "--greedy-auto-updates", {
           description: "Also include casks with `auto_updates true`.",
         }],
-        *Cask::Cmd::AbstractCommand::OPTIONS.map(&:dup),
+        [:switch, "--[no-]binaries", {
+          description: "Disable/enable linking of helper executables (default: enabled).",
+          env:         :cask_opts_binaries,
+        }],
+        [:switch, "--require-sha",  {
+          description: "Require all casks to have a checksum.",
+          env:         :cask_opts_require_sha,
+        }],
+        [:switch, "--[no-]quarantine", {
+          description: "Disable/enable quarantining of downloads (default: enabled).",
+          env:         :cask_opts_quarantine,
+        }],
       ].each do |args|
         options = args.pop
         send(*args, **options)
diff --git a/Library/Homebrew/extend/os/mac/missing_formula.rb b/Library/Homebrew/extend/os/mac/missing_formula.rb
index 681747e88b..c7f7e701ed 100644
--- a/Library/Homebrew/extend/os/mac/missing_formula.rb
+++ b/Library/Homebrew/extend/os/mac/missing_formula.rb
@@ -1,7 +1,6 @@
 # typed: strict
 # frozen_string_literal: true
 
-require "cask/cmd/abstract_command"
 require "cask/info"
 require "cask/cask_loader"
 require "cask/caskroom"