Revert "audit: add benchmark inject code"

This reverts commit fb23d603ded2796299ed7fc2f4ffee22870b7ea6.

Library/Homebrew/cmd/audit.rb

@@ -20,26 +20,6 @@ module Homebrew
     ENV.activate_extensions!
     ENV.setup_build_environment
 
-    if ARGV.switch? "D"
-      FormulaAuditor.module_eval do
-        instance_methods.grep(/audit_/).map do |name|
-          method = instance_method(name)
-          define_method(name) do |*args, &block|
-            begin
-              time = Time.now
-              method.bind(self).(*args, &block)
-            ensure
-              $times[name] ||= 0
-              $times[name] += Time.now - time
-            end
-          end
-        end
-      end
-
-      $times = {}
-      at_exit { puts $times.sort_by{ |k, v| v }.map{ |k, v| "#{k}: #{v}" } }
-    end
-
     ff = if ARGV.named.empty?
       Formula
     else