Revert "Add ExternalTexture class into RenderEngine interface"

Revert submission 14086921-renderengine-external-tex

Reason for revert: Potential culprit for b/185361988
Reverted Changes:
I7796764e2:Update WaylandRenderSurface to accomodate interfac...
I13904eec4:Update Readback VTS to align with RenderEngine int...
I222c71e6e:Add ExternalTexture class into RenderEngine interf...

Change-Id: I1501890f4861a3df7ce273f1fe2ccdb275e2632c
diff --git a/libs/renderengine/tests/RenderEngineThreadedTest.cpp b/libs/renderengine/tests/RenderEngineThreadedTest.cpp
index e3917cc..b093e88 100644
--- a/libs/renderengine/tests/RenderEngineThreadedTest.cpp
+++ b/libs/renderengine/tests/RenderEngineThreadedTest.cpp
@@ -162,18 +162,15 @@
 TEST_F(RenderEngineThreadedTest, drawLayers) {
     renderengine::DisplaySettings settings;
     std::vector<const renderengine::LayerSettings*> layers;
-    std::shared_ptr<renderengine::ExternalTexture> buffer = std::make_shared<
-            renderengine::ExternalTexture>(new GraphicBuffer(), *mRenderEngine,
-                                           renderengine::ExternalTexture::Usage::READABLE |
-                                                   renderengine::ExternalTexture::Usage::WRITEABLE);
+    sp<GraphicBuffer> buffer = new GraphicBuffer();
     base::unique_fd bufferFence;
     base::unique_fd drawFence;
 
     EXPECT_CALL(*mRenderEngine, drawLayers)
             .WillOnce([](const renderengine::DisplaySettings&,
                          const std::vector<const renderengine::LayerSettings*>&,
-                         const std::shared_ptr<renderengine::ExternalTexture>&, const bool,
-                         base::unique_fd&&, base::unique_fd*) -> status_t { return NO_ERROR; });
+                         const sp<GraphicBuffer>&, const bool, base::unique_fd&&,
+                         base::unique_fd*) -> status_t { return NO_ERROR; });
 
     status_t result = mThreadedRE->drawLayers(settings, layers, buffer, false,
                                               std::move(bufferFence), &drawFence);