Remove syscheck-baseline.c

This doesn't seem to be used anymore and I'm not sure what it's purpose is or was. My guess is it was some type of testing or stand alone tool. The building of this application was removed in d88cf1c9. The commit doesn't really explain why unfortunately.

Perhaps someone with more knowledge of OSSEC can explain what this does and if it has any use anymore. This might be essential to testing or something like that but as of right now I don't see a reason to keep it.