Use matrix-analytics-events generated stubs (locally for now).

Track screens, removing any that aren't part of the schema.

Riot/Modules/Rooms/DirectoryPicker/DirectoryServerPickerViewController.m

@@ -145,9 +145,6 @@
 {
     [super viewWillAppear:animated];
 
-    // Screen tracking
-    [Analytics.shared trackScreen:@"DirectoryServerPicker"];
-
     // Observe kAppDelegateDidTapStatusBarNotificationObserver.
     kAppDelegateDidTapStatusBarNotificationObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kAppDelegateDidTapStatusBarNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
 

Riot/Modules/Rooms/RoomsViewController.m

@@ -36,13 +36,6 @@
     return viewController;
 }
 
-- (void)finalizeInit
-{
-    [super finalizeInit];
-    
-    self.screenName = @"Rooms";
-}
-
 - (void)viewDidLoad
 {
     [super viewDidLoad];