lib: remove unused kallithea/lib/profiler.py

pylint found import-error 'import objgraph'. This is bit-rotten and doesn't
seem like something we need. If we need it, there is probably a better way to
do it now.

scripts/manifest

@@ -356,7 +356,6 b' kallithea/lib/paster_commands/setup_db.p'
 kallithea/lib/paster_commands/template.ini.mako
 kallithea/lib/paster_commands/update_repoinfo.py
 kallithea/lib/pidlock.py
-kallithea/lib/profiler.py
 kallithea/lib/rcmail/
 kallithea/lib/rcmail/__init__.py
 kallithea/lib/rcmail/exceptions.py