i18n: drop translations of push-to-lock strings, removed in 99edd97366e3 A few of the dropped strings had meanwhile been translated. That gave conflicts when rebasing the po update from 99edd97366e3 and to branch head. That was resolved by dropping these conflicts.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.