In simple words, sourcing means to load or set what is mentioned in specified file line-by-line. So,
Code:
. /<path to actual script>/removelogs
... means that read the file removelogs line-by-line and load or set everything mentioned in it, in your working shell environment.
Similarly,
Code:
. /home/admin/.bash_profile
... means that read the file .bash_profile line-by-line and load or set everything mentioned in it, in your working shell environment.
I suppose, your script (which has to be scheduled in cron) is
cron_removelogs, not removelogs file.
Anyway, let's know what problem you're facing?