Remove dead code (refs #4704)

Request::response() doesn't exist any more so there is no way this works any more.
We'll have to make $response a required parameter in a future major release.
Remove $_SERVER['SERVER_PROTOCOL'] usage from Kohana_Request (refs #4661)
Fix extraneous white space in Validation.php
Merge pull request #374 from EvanPurkhiser/patch-1

Fix extraneous white space in Validation.php