cleanup: remove check only needed for hg versions before 4.4
ui.edit() has had the "action" argument since 6e6452bc441d (editor:
use an unambiguous path suffix for editor files, 2017-08-30), which
was first released in hg version 4.4. Since we support only versions
higher than 4.5, we can drop this check.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/