[PATCH 10/14] fix compiler warning in ordinal()

When building the following compiler warning is emitted

tools.c: In function ‘ordinal’:
tools.c:477:9: warning: null destination pointer [-Wformat-overflow=]
  477 |         sprintf(buf, "%ld", val);

As there are no users of the function simply remove it.

Signed-off-by: Philipp Rudo <prudo@redhat.com>