Revert r31505, r31510 (secureAndSplit hook).

This hook doesn't seem well thought out; a hook isn't given clean access to the various possible fields it's likely to want to manipulate, and generally feels a bit rushed.

docs/hooks.txt

@@ -1029,10 +1029,6 @@ $user: user who did the move
 $pageid: database ID of the page that's been moved
 $redirid: database ID of the created redirect
 
-'TitleSecureAndSplit': At the end of Title::secureAndSplit()
-$title: The Title object
-$dbkey: The DB key
-
 'UndeleteShowRevision': called when showing a revision in Special:Undelete
 $title: title object related to the revision
 $rev: revision (object) that will be viewed

includes/Title.php

@@ -2102,17 +2102,13 @@ class Title {
 			return false;
 		}
 		
-		# Hooks can reject titles by returning false
-		if(!wfRunHooks('TitleSecureAndSplit', array( $this, &$dbkey )))
-			return false;
-		
 		# Fill fields
 		$this->mDbkeyform = $dbkey;
 		$this->mUrlform = wfUrlencode( $dbkey );
 
 		$this->mTextform = str_replace( '_', ' ', $dbkey );
-		
-		return true; 
+
+		return true;
 	}
 
 	/**