[ios] Fix the user location not getting displayed when setting tracking mode to followWithCourse and followWithHeading (#13849)

Removed legacy code that was causing the mapView to ignore setting the user location to tracking modes follingWithCourse and followWithHeading.

platform/ios/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 Mapbox welcomes participation and contributions from everyone. Please read [CONTRIBUTING.md](../../CONTRIBUTING.md) to get started.
 
+## master
+
+* Fixed a bug where setting `MGLMapView.userTrackingMode` to `MGLUserTrackingModeFollowWithHeading` and `MGLUserTrackingModeFollowWithCourse` was being ignored. ([#13849](https://github.com/mapbox/mapbox-gl-native/pull/13849))
+
 ## 4.8.0
 
 ### Styles and rendering

platform/ios/src/MGLMapView.mm

@@ -5163,12 +5163,6 @@ public:
     MGLLogDebug(@"Setting userTrackingMode: %lu animated: %@", mode, MGLStringFromBOOL(animated));
     if (mode == _userTrackingMode) return;
 
-    if ((mode == MGLUserTrackingModeFollowWithHeading || mode == MGLUserTrackingModeFollowWithCourse) &&
-        ! CLLocationCoordinate2DIsValid(self.userLocation.coordinate))
-    {
-        mode = MGLUserTrackingModeNone;
-    }
-
     MGLUserTrackingMode oldMode = _userTrackingMode;
     [self willChangeValueForKey:@"userTrackingMode"];
     _userTrackingMode = mode;