Remove unused $enableAppsCache in OC_App

Signed-off-by: Tobia De Koninck <tobia@ledfan.be>

lib/private/legacy/app.php

@@ -157,13 +157,6 @@ class OC_App {
 					\OC::$server->getAppManager()->disableApp($app);
 				}
 			}
-			if (self::isType($app, array('authentication'))) {
-				// since authentication apps affect the "is app enabled for group" check,
-				// the enabled apps cache needs to be cleared to make sure that the
-				// next time getEnableApps() is called it will also include apps that were
-				// enabled for groups
-				self::$enabledAppsCache = [];
-			}
 			\OC::$server->getEventLogger()->end('load_app_' . $app);
 		}
 
@@ -329,11 +322,6 @@ class OC_App {
 		}
 	}
 
-	/**
-	 * get all enabled apps
-	 */
-	protected static $enabledAppsCache = [];
-
 	/**
 	 * Returns apps enabled for the current user.
 	 *
@@ -393,7 +381,6 @@ class OC_App {
 	 */
 	public function enable(string $appId,
 						   array $groups = []) {
-		self::$enabledAppsCache = []; // flush
 
 		// Check if app is already downloaded
 		$installer = \OC::$server->query(Installer::class);