Removes .pulp from python-kombu release field for 3.0.24

Removes '.pulp' from the python-kombu release field and also negative commits the tito commit 6b2ebba6bfba08c064429fded625d3e0478676a0

It's right to not have '.pulp' in the release field because we are now using a vanilla dependency without any patches.

The tito commit 6b2ebba6bfba08c064429fded625d3e0478676a0 was never built on koji, so this negative commit should reset the state enough so that I can rerun tito tag and then build it right.