mesa: remove unused gl_context::DriverCtx field

src/mesa/main/context.c

@@ -934,7 +934,6 @@ _mesa_initialize_context(struct gl_context *ctx,
     * textures.
     */
    ctx->Driver = *driverFunctions;
-   ctx->DriverCtx = driverContext;
 
    if (share_list) {
       /* share state with another context */

src/mesa/main/mtypes.h

@@ -3403,8 +3403,6 @@ struct gl_context
     */
    struct dd_function_table Driver;
 
-   void *DriverCtx;	/**< Points to device driver context/state */
-
    /** Core/Driver constants */
    struct gl_constants Const;
 

src/mesa/x86/gen_matypes.c

@@ -93,7 +93,6 @@ int main( int argc, char **argv )
     */
    OFFSET_HEADER( "struct gl_context" );
 
-   OFFSET( "CTX_DRIVER_CTX              ", struct gl_context, DriverCtx );
    printf( "\n" );
    OFFSET( "CTX_LIGHT_ENABLED           ", struct gl_context, Light.Enabled );
    OFFSET( "CTX_LIGHT_SHADE_MODEL       ", struct gl_context, Light.ShadeModel );