Refactoring: Rename SurfaceTextureClient to Surface

Change-Id: Ie745d9adf5465834bb8bf751a2f88b19435fdf46
diff --git a/include/system/window.h b/include/system/window.h
index 4698fb3..b8a19c8 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -321,7 +321,6 @@
 enum {
     NATIVE_WINDOW_FRAMEBUFFER               = 0, /* FramebufferNativeWindow */
     NATIVE_WINDOW_SURFACE                   = 1, /* Surface */
-    NATIVE_WINDOW_SURFACE_TEXTURE_CLIENT    = 2, /* SurfaceTextureClient */
 };
 
 /* parameter for NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP