Remove exception for Chrome on Mobile

This didn't really work anyways and Chrome 54 for Android has been pushed out via Google Play on October 19th. So we should remove this.

This is only in master and doesn't affect any stable branch.

Fixes https://github.com/nextcloud/server/issues/2318

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

lib/base.php

@@ -538,15 +538,6 @@ class OC {
 			return;
 		}
 
-		// Chrome on Android has a bug that it doesn't sent cookies with the
-		// same-site attribute for the download manager. To work around that
-		// all same-site cookies get deleted and recreated directly. Awesome!
-		// FIXME: Remove once Chrome 54 is deployed to end-users
-		// @see https://github.com/nextcloud/server/pull/1454
-		if($request->isUserAgent([\OC\AppFramework\Http\Request::USER_AGENT_ANDROID_MOBILE_CHROME])) {
-			return;
-		}
-
 		if(count($_COOKIE) > 0) {
 			$requestUri = $request->getScriptName();
 			$processingScript = explode('/', $requestUri);