The macro _DEBUG_HASHES is nowhere used. The configuration DEBUG_HASHES
enables debugging of the SELinux hash tables, but the with an underscore
prefixed macro definition has no direct impact or any documentation.
Reported by clang [-Wunused-macros]
Signed-off-by: Christian Göttsche <cgzones@googlemail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Paul Moore <paul@paul-moore.com>