Silence unused private member warning

Removed mConfig from Context and related functions.

Change-Id: I91eba6a4dbbd8ff48f212a246b1894009d513436
Reviewed-on: https://swiftshader-review.googlesource.com/5531
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/OpenGL/libGLES_CM/Context.h b/src/OpenGL/libGLES_CM/Context.h
index 1bef6b6..24e5a08 100644
--- a/src/OpenGL/libGLES_CM/Context.h
+++ b/src/OpenGL/libGLES_CM/Context.h
@@ -294,7 +294,7 @@
 class Context : public egl::Context
 {
 public:
-	Context(egl::Display *display, const egl::Config *config, const Context *shareContext);
+	Context(egl::Display *display, const Context *shareContext);
 
 	virtual void makeCurrent(egl::Surface *surface);
 	virtual int getClientVersion() const;