droping unnecessary (and outdated) pybabel

extract-messages.sh was 'fixed' in ff0e551bd7eaa9cb26d14a6606d66eb4ae9de7e0

pybabel

-#!env/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'Babel==0.9.6','console_scripts','pybabel'
-__requires__ = 'Babel==0.9.6'
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.exit(
-        load_entry_point('Babel==0.9.6', 'console_scripts', 'pybabel')()
-    )