[ios] Remove iosapp test stub

The PR to add filter predicates (#6049) added logic to apply some
runtime styling to the iosapp as soon as the map finished loading.
This removes that logic.

platform/ios/app/MBXViewController.m

@@ -79,29 +79,6 @@ - (void)viewDidLoad
     self.debugLoggingEnabled = [[NSUserDefaults standardUserDefaults] boolForKey:@"MGLMapboxMetricsDebugLoggingEnabled"];
 }
 
-- (void)mapViewDidFinishLoadingMap:(MGLMapView *)mapView
-{
-    [mapView setCenterCoordinate:CLLocationCoordinate2DMake(52.36, 4.86) zoomLevel:12 animated:NO];
-
-#warning DEBUG CODE
-
-    NSString *filePath = [[NSBundle bundleForClass:self.class] pathForResource:@"amsterdam" ofType:@"geojson"];
-    NSURL *url = [NSURL fileURLWithPath:filePath];
-    NSData *geoJSONData = [NSData dataWithContentsOfURL:url];
-    MGLGeoJSONSource *source = [[MGLGeoJSONSource alloc] initWithSourceIdentifier:@"source" geoJSONData:geoJSONData];
-    [self.mapView.style addSource:source];
-
-    MGLFillStyleLayer *parksLayer = [[MGLFillStyleLayer alloc] initWithLayerIdentifier:@"park-layer" sourceIdentifier:@"source"];
-    parksLayer.fillColor = [UIColor redColor];
-    parksLayer.predicate = [NSPredicate predicateWithFormat:@"name == 'Westerpark'"];
-    [self.mapView.style addLayer:parksLayer];
-
-    MGLFillStyleLayer *singleParkLayer = [[MGLFillStyleLayer alloc] initWithLayerIdentifier:@"single-park-layer" sourceIdentifier:@"source"];
-    singleParkLayer.fillColor = [UIColor greenColor];
-    singleParkLayer.predicate = [NSPredicate predicateWithFormat:@"name == 'vondelpark'"];
-    [self.mapView.style addLayer:singleParkLayer];
-}
-
 - (void)viewDidAppear:(BOOL)animated
 {
     [super viewDidAppear:animated];