Remove GL_APPLE_texture_format_BGRA8888 from gl strings

Exposing "GL_APPLE_texture_format_BGRA8888" fully enables BGRA8 in
Chromium and it seems like SwiftShader isn't properly supporting it
yet, so removing the string for now in order to do the DEPS roll.

Change-Id: I72f57899b820c22ac76a59b0b7a5e3d2a920e2b3
Reviewed-on: https://swiftshader-review.googlesource.com/16268
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

src/OpenGL/libGLESv2/Context.cpp

diff --git a/src/OpenGL/libGLESv2/Context.cpp b/src/OpenGL/libGLESv2/Context.cpp
index 6f16f82..26bb8cc 100644
--- a/src/OpenGL/libGLESv2/Context.cpp
+++ b/src/OpenGL/libGLESv2/Context.cpp
@@ -4404,7 +4404,7 @@
 		"GL_ANGLE_texture_compression_dxt3",
 		"GL_ANGLE_texture_compression_dxt5",
 #endif
-		"GL_APPLE_texture_format_BGRA8888",
+		//"GL_APPLE_texture_format_BGRA8888",
 		"GL_CHROMIUM_texture_filtering_hint",
 		"GL_NV_fence",
 		"GL_NV_framebuffer_blit",