- remove mac/cmd/update-report

- repair if condition
- repair require filename

Library/Homebrew/cmd/update-report.rb

@@ -9,7 +9,7 @@ require "description_cache_store"
 require "cli/parser"
 require "settings"
 require "linuxbrew-core-migration"
-require "extend/os/update-report"
+require "extend/os/cmd/update-report"
 
 module Homebrew
   extend T::Sig

Library/Homebrew/extend/os/mac/cmd/update-report.rb

@@ -1,12 +0,0 @@
-# typed: false
-# frozen_string_literal: true
-
-module Homebrew
-  extend T::Sig
-
-  module_function
-
-  def migrate_gcc_dependents_if_needed
-    # do nothing
-  end
-end

Library/Homebrew/extend/os/update-report.rb

@@ -1,8 +1,6 @@
 # typed: strict
 # frozen_string_literal: true
 
-if OS.mac?
-  require "extend/os/mac/cmd/update-report"
-elsif OS.linux?
+if OS.linux?
   require "extend/os/linux/cmd/update-report"
 end