Remove unnecessary require statements

Should have been removed via 8e43fc5.

Author: maclover7

activesupport/lib/active_support/core_ext/load_error.rb

@@ -1,6 +1,3 @@
-require "active_support/deprecation"
-require "active_support/deprecation/proxy_wrappers"
-
 class LoadError
   REGEXPS = [
     /^no such file to load -- (.+)$/i,