Revert "bring in tweaked compass snapping fixes from @friedbunny"

See #1064: problematic & can wait until after beta

This reverts commit 9dd9bd6e9d.

platform/ios/MGLMapView.mm

@@ -703,8 +703,6 @@ mbgl::DefaultFileSource *mbglFileSource = nullptr;
 
         [self unrotateIfNeededAnimated:YES];
 
-        [self snapCompassIfNeeded];
-
         [self notifyMapChange:@(mbgl::MapChangeRegionDidChangeAnimated)];
     }
 }
@@ -1712,7 +1710,7 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
     return (self.zoomLevel > 3);
 }
 
-// correct rotations to north as needed at low zooms
+// correct rotations to north as needed
 //
 - (void)unrotateIfNeededAnimated:(BOOL)animated
 {
@@ -1886,22 +1884,6 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
     }
 }
 
-// reset north on very small gesture-induced angles
-//
-- (void)snapCompassIfNeeded
-{
-    double degrees = mbglMap->getBearing() * -1;
-    while (degrees >= 360) degrees -= 360;
-    while (degrees < 0) degrees += 360;
-
-    double tolerance = 7;
-
-    if (self.compass.alpha > 0 && (degrees < tolerance || degrees > 360 - tolerance))
-    {
-        [self resetNorthAnimated:YES];
-    }
-}
-
 + (UIImage *)resourceImageNamed:(NSString *)imageName
 {
     if ( ! [[imageName pathExtension] length])