Delete GLESRenderEngine

GLESRenderEngine was replaced by SkiaRenderEngine in Android 12. To
avoid bitrotting an unsupported RenderEngine backend, let's just delete
it.

There is still some cleanup for texture creation and deletion which
are no-ops in RenderEngine, but those changes are slightly less trivial
so they will be done in a followup.

Bug: 199918329
Test: builds
Change-Id: I1ec4bd6520cd2e8dad1c30f8acef9f004f190806
diff --git a/libs/renderengine/tests/RenderEngineThreadedTest.cpp b/libs/renderengine/tests/RenderEngineThreadedTest.cpp
index fe3a16d..281a502 100644
--- a/libs/renderengine/tests/RenderEngineThreadedTest.cpp
+++ b/libs/renderengine/tests/RenderEngineThreadedTest.cpp
@@ -36,7 +36,7 @@
     void SetUp() override {
         mThreadedRE = renderengine::threaded::RenderEngineThreaded::create(
                 [this]() { return std::unique_ptr<renderengine::RenderEngine>(mRenderEngine); },
-                renderengine::RenderEngine::RenderEngineType::THREADED);
+                renderengine::RenderEngine::RenderEngineType::SKIA_GL_THREADED);
     }
 
     std::unique_ptr<renderengine::threaded::RenderEngineThreaded> mThreadedRE;
@@ -57,18 +57,6 @@
     mThreadedRE->getContextPriority();
 }
 
-TEST_F(RenderEngineThreadedTest, genTextures) {
-    uint32_t texName;
-    EXPECT_CALL(*mRenderEngine, genTextures(1, &texName));
-    mThreadedRE->genTextures(1, &texName);
-}
-
-TEST_F(RenderEngineThreadedTest, deleteTextures) {
-    uint32_t texName;
-    EXPECT_CALL(*mRenderEngine, deleteTextures(1, &texName));
-    mThreadedRE->deleteTextures(1, &texName);
-}
-
 TEST_F(RenderEngineThreadedTest, getMaxTextureSize_returns20) {
     size_t size = 20;
     EXPECT_CALL(*mRenderEngine, getMaxTextureSize()).WillOnce(Return(size));