evolve: remove the unnecessary condition to check empty successors set
I annotated the history of this "newer == [()]" condition and found
that it was added in the initial stages of evolution project (more than
8 years ago) and there is no test where we get [()] as a successor set.
So looks like "if not newer" is enough to check if it is empty.
I also looked into obsutil.successorssets() implementation and
I don't think it would give us [()] in any case.
exclude contrib
exclude .hg-format-source
recursive-exclude contrib *
exclude hgext3rd/evolve/hack
exclude .gitlab-ci.yml
recursive-exclude hgext3rd/evolve/hack *
exclude hgext3rd/evolve/legacy.py
exclude Makefile
exclude tests/test-drop.t
exclude tests/test-inhibit.t
exclude tests/test-oldconvert.t
exclude docs/tutorial/.netlify
include COPYING
include docs/figures/hgview-example.png
include docs/makefile
include docs/*.py
include docs/README
include docs/*.rst
include docs/static/*.svg
include docs/tutorials/*.t
include hgext3rd/__init__.py
include hgext3rd/evolve/*.py
include hgext3rd/evolve/thirdparty/*.py
include hgext3rd/topic/*.py
include hgext3rd/topic/README
include MANIFEST.in
include README
include CHANGELOG
include setup.py
include tests/*.py
include tests/*.sh
include tests/testlib/*.sh
include tests/*.t
recursive-include docs/tutorial *.rst
recursive-include docs/tutorial *.css
include docs/tutorial/standalone.html
recursive-include docs/tutorial *.js
recursive-include docs/tutorial *.md
recursive-include docs/tutorial *.py
recursive-include docs/tutorial *.sh
recursive-include docs/tutorial *.t
prune debian
recursive-include docs/figures *.svg