Revert "Enable vulkan webview draw functor"

This reverts commit dec730fda5.

Reason for revert: b/123877499

Change-Id: I14fc562c81f5ef5dab0f5404402b64858e54e364

native/webview/plat_support/draw_functor.cpp

@@ -163,6 +163,9 @@ int CreateFunctor(void* data, AwDrawFnFunctorCallbacks* functor_callbacks) {
         webview_functor_callbacks.vk.initialize = &initializeVk;
         webview_functor_callbacks.vk.draw = &drawVk;
         webview_functor_callbacks.vk.postDraw = &postDrawVk;
+        // TODO(boliu): Remove this once SkiaRecordingCanvas::drawWebViewFunctor
+        // no longer uses GL interop.
+        webview_functor_callbacks.gles.draw = &draw_gl;
         break;
     }
     callbacks_initialized = true;