Revert "[core] Ensure image dependencies in GeometryTileWorker::onIma…

…gesAvailable"

This reverts commit cd8eb13.

src/mbgl/tile/geometry_tile_worker.cpp

@@ -218,12 +218,7 @@ void GeometryTileWorker::onGlyphsAvailable(GlyphMap newGlyphMap) {
 
 void GeometryTileWorker::onImagesAvailable(ImageMap newImageMap) {
     imageMap = std::move(newImageMap);
-    for (const auto& pair : imageMap) {
-        auto it = pendingImageDependencies.find(pair.first);
-        if (it != pendingImageDependencies.end()) {
-            pendingImageDependencies.erase(it);
-        }
-    }
+    pendingImageDependencies.clear();
     symbolDependenciesChanged();
 }