.coveragerc: remove reference to non-existing paster_commands dir

The corresponding code is now in kallithea/bin/, which is already in the
omit list.

.coveragerc

@@ -1,19 +1,18 b''
 [run]
 omit =
     # the bin scripts are not part of the Kallithea web app
     kallithea/bin/*
     # we ship with no active extensions
     kallithea/config/rcextensions/*
-    # dbmigrate and paster_commands are not part of the Kallithea web app
+    # dbmigrate is not a part of the Kallithea web app
     kallithea/lib/dbmigrate/*
-    kallithea/lib/paster_commands/*
     # the tests themselves should not be part of the coverage report
     kallithea/tests/*
     # the scm hooks are not run in the kallithea process
     kallithea/config/post_receive_tmpl.py
     kallithea/config/pre_receive_tmpl.py
 
 [paths]
 source =
     kallithea/
     **/workspace/*/kallithea