Remove duplicated version of check_required_library.
Remove duplicated version of check_required_library.

Signed-off-by: Tom Prince <tom.prince@ualberta.net>

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@14486 85f007b7-540e-0410-9357-904b9bb8a0f7

maximedenes/native-coq,maximedenes/native-coq,maximedenes/native-coq