remove unneeded destruct methods as GC has higher performance (#6631)

Co-authored-by: Tim Fry <tim@voipstratus.com>

app/call_centers/resources/classes/call_center.php

@@ -62,16 +62,6 @@
 					$this->app_uuid = '95788e50-9500-079e-2807-fd530b0ea370';
 			}
 
-			/**
-			 * Called when there are no references to a particular object
-			 * unset the variables used in the class
-			 */
-			public function __destruct() {
-				foreach ($this as $key => $value) {
-					unset($this->$key);
-				}
-			}
-
 			/**
 			 * Add a dialplan for call center
 			 * @var string $domain_uuid		the multi-tenant id