Remove unused code in include/

- Remove unused variables

include/api.php

@@ -3735,7 +3735,6 @@ function api_direct_messages_new($type)
 	}
 
 	$replyto = '';
-	$sub     = '';
 	if (!empty($_REQUEST['replyto'])) {
 		$r = q(
 			'SELECT `parent-uri`, `title` FROM `mail` WHERE `uid`=%d AND `id`=%d',

include/conversation.php

@@ -940,7 +940,6 @@ function item_photo_menu($item) {
  */
 function builtin_activity_puller($item, &$conv_responses) {
 	foreach ($conv_responses as $mode => $v) {
-		$url = '';
 		$sparkle = '';
 
 		switch ($mode) {

include/items.php

@@ -302,8 +302,6 @@ function subscribe_to_hub($url, array $importer, array $contact, $hubmode = 'sub
 		return;
 	}
 
-	$a = BaseObject::getApp();
-
 	$user = DBA::selectFirst('user', ['nickname'], ['uid' => $importer['uid']]);
 
 	// No user, no nickname, we quit