Revert "Fix glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, ...)"

This reverts commit ca40662aa81f7735d3510fa52e55d28503c7f9ec.

https://chromium.googlesource.com/angle/angle/+/ca40662aa81f7735d3510fa52e55d28503c7f9ec broke angle_end2end_tests on the Win Debug bots. Examples: 

https://build.chromium.org/p/chromium.gpu.fyi/builders/Win7%20Debug%20%28NVIDIA%29/builds/18718 
https://build.chromium.org/p/chromium.gpu.fyi/builders/Win8%20Debug%20%28NVIDIA%29/builds/15905 

Tests failing: 
Texture2DTest.QueryBinding/ES2_D3D11 
Texture2DTest.QueryBinding/ES2_D3D9 
Texture2DTest.QueryBinding/ES2_D3D11_9_3

Change-Id: If9da864f49e0de3a134d43ae36c2a99e9b5a2a53
Reviewed-on: https://chromium-review.googlesource.com/391130
Reviewed-by: John Bauman <jbauman@chromium.org>
diff --git a/src/libANGLE/validationES.cpp b/src/libANGLE/validationES.cpp
index fff9088..4521be5 100644
--- a/src/libANGLE/validationES.cpp
+++ b/src/libANGLE/validationES.cpp
@@ -1735,12 +1735,10 @@
       case GL_TEXTURE_BINDING_2D_ARRAY:
         break;
       case GL_TEXTURE_BINDING_EXTERNAL_OES:
-          if (!context->getExtensions().eglStreamConsumerExternal &&
-              !context->getExtensions().eglImageExternal)
+          if (!context->getExtensions().eglStreamConsumerExternal)
           {
-              context->handleError(Error(GL_INVALID_ENUM,
-                                         "Neither NV_EGL_stream_consumer_external nor "
-                                         "GL_OES_EGL_image_external extensions enabled"));
+              context->handleError(
+                  Error(GL_INVALID_ENUM, "NV_EGL_stream_consumer_external extension not enabled"));
               return false;
           }
           break;