dispatch: Update check_table.cpp to reflect recent aliasing changes.

dispatch: Update check_table.cpp to reflect recent aliasing changes.

In commits bad96f6 and e7dd2e5 I added the following aliases:
- ClampColor -> ClampColorARB
- VertexAttribDivisor -> VertexAttribDivisorARB

But I neglected to update check_table.cpp, causing "make check" to
fail for non-shared-glapi builds.

This patch removes the functions that are now aliased from
check_table.cpp, so that "make check" works correctly again.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>