[ios] Stop using reuse queue

This commit temporarily stops using the reuse queue until we have a
solution for querying point annotations on the map that is tested
for the case of querying while the map is panned, rotated, and
zoomed.

The existing solution was not performant because:

1) There was a bug that prevented the reuse queue from being
fully utilized since the updateAnnotationViews logic would pull
enqueued views right off the queue when it found a nil annotationView.

2) The constant lookup / add / remove operations on the NSArray
implementation of the reuse queue required a lot of CPU to keep up with.

Although this commit is a regression, it is actually more performant
to not use the reuse queue and to just update the center of every
annotation. Once we have the ability to query for annotations that
are visible in the current view port it'll make sense to bring
back the reuse queue.

Author: boundsj

platform/ios/src/MGLMapView.mm

@@ -4549,51 +4549,18 @@ - (void)updateAnnotationViews
 
     for (auto &pair : _annotationContextsByAnnotationTag)
     {
-        CGRect viewPort = CGRectInset(self.bounds,
-                                      -_largestAnnotationViewSize.width / 2.0 - MGLAnnotationUpdateViewportOutset.width / 2.0,
-                                      -_largestAnnotationViewSize.height / 2.0 - MGLAnnotationUpdateViewportOutset.width);
-        
         MGLAnnotationContext &annotationContext = pair.second;
-        MGLAnnotationView *annotationView = annotationContext.annotationView;
-
+        
         // Defer to the shape/polygon styling delegate methods
         if ([annotationContext.annotation isKindOfClass:[MGLMultiPoint class]])
         {
             continue;
         }
-
-        if (!annotationView)
-        {
-            MGLAnnotationView *annotationView = [self annotationViewForAnnotation:annotationContext.annotation];
-            if (annotationView)
-            {
-                // If the annotation view has no superview it means it was never used before so add it
-                if (!annotationView.superview)
-                {
-                    [self.glView addSubview:annotationView];
-                }
-                
-                annotationView.mapView = self;
-                annotationView.center = [self convertCoordinate:annotationContext.annotation.coordinate toPointToView:self];
-                annotationContext.annotationView = annotationView;
-            }
-        }
-       
-        // if there is no annotationView at this point then we are dealing with a sprite backed annotation
-        if (!annotationView)
-        {
-            continue;
-        }
 
-        bool annotationViewIsVisible = CGRectContainsRect(viewPort, annotationView.frame);
-        if (!annotationViewIsVisible)
-        {
-            [self enqueueAnnotationViewForAnnotationContext:annotationContext];
-        }
-        else
-        {
-            annotationView.center = [self convertCoordinate:annotationContext.annotation.coordinate toPointToView:self];
-        }
+        // TODO: add back logic to use reuse queue when there is a working solution for querying point annotation on the map
+
+        MGLAnnotationView *annotationView = annotationContext.annotationView;
+        annotationView.center = [self convertCoordinate:annotationContext.annotation.coordinate toPointToView:self];
     }
 
     [CATransaction commit];
@@ -4602,7 +4569,7 @@ - (void)updateAnnotationViews
 - (void)enqueueAnnotationViewForAnnotationContext:(MGLAnnotationContext &)annotationContext
 {
     MGLAnnotationView *annotationView = annotationContext.annotationView;
-    
+   
     if (!annotationView) return;
 
     annotationView.annotation = nil;