Do not check defined?(CGI) on every call #to_query

activesupport/lib/active_support/core_ext/object/to_query.rb

@@ -1,12 +1,12 @@
 require 'active_support/core_ext/object/to_param'
+require 'cgi'
 
 class Object
   # Converts an object into a string suitable for use as a URL query string, using the given <tt>key</tt> as the
   # param name.
   #
   # Note: This method is defined as a default implementation for all Objects for Hash#to_query to work.
   def to_query(key)
-    require 'cgi' unless defined?(CGI) && defined?(CGI::escape)
     "#{CGI.escape(key.to_param)}=#{CGI.escape(to_param.to_s)}"
   end
 end