i965: remove unused brwInitVtbl declaration

function was removed by b3360d23ac1db61390b2ac8963756c6133ba6e23

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 2dd2686..17b4256 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1241,11 +1241,6 @@
    struct intel_screen *screen;
 };
 
-/*======================================================================
- * brw_vtbl.c
- */
-void brwInitVtbl( struct brw_context *brw );
-
 /* brw_clear.c */
 extern void intelInitClearFuncs(struct dd_function_table *functions);