Remove MachO check for Executable.

Library/Homebrew/unpack_strategy/executable.rb

@@ -1,17 +1,9 @@
 require_relative "uncompressed"
 
-require "vendor/macho/macho"
-
 module UnpackStrategy
   class Executable < Uncompressed
     def self.can_extract?(path:, magic_number:)
-      return true if magic_number.match?(/\A#!\s*\S+/n)
-
-      begin
-        path.file? && MachO.open(path).header.executable?
-      rescue MachO::NotAMachOError
-        false
-      end
+      magic_number.match?(/\A#!\s*\S+/n)
     end
   end
 end