[search] Remove more dead code

This code in SpecialSearch looks to still be around from the days where
there was a feature that go would send you to directly to an edit page,
rather than showing search results. That feature no longer exists, so
remove the related code.

Change-Id: If5b064b08a6258bfab31ab8f8b62c1d7283c8912

includes/specials/SpecialSearch.php

@@ -234,11 +234,6 @@ class SpecialSearch extends SpecialPage {
 
 			return;
 		}
-		# No match, generate an edit URL
-		$title = Title::newFromText( $term );
-		if ( !is_null( $title ) ) {
-			Hooks::run( 'SpecialSearchNogomatch', [ &$title ] );
-		}
 		$this->showResults( $term );
 	}