Remove unused command_args

Extra command_args in gain_permissions_remove caused silent failure and path never gets deleted.

Library/Homebrew/cask/lib/hbc/utils.rb

@@ -43,7 +43,7 @@ module Hbc
             p.rmtree
           else
             command.run("/bin/rm",
-                        args: command_args + ["-r", "-f", "--", p],
+                        args: ["-r", "-f", "--", p],
                         sudo: true)
           end
         end