Remove unused code

- Remove commented code
- Remove unused/immediately overwritten variables
- Remove extraneous parameters
- Remove unreachable code
- Remove duplicate array keys

src/Model/GContact.php

@@ -528,8 +528,6 @@ class GContact
 	 */
 	public static function updateSuggestions()
 	{
-		$a = \get_app();
-
 		$done = [];
 
 		/// @TODO Check if it is really neccessary to poll the own server