simplemerge: delete unused find_unconflicted() The function has been unused ever since it was introduced in 465b9ea02868 (Import 3-way merge code from bzr, 2007-04-16). Differential Revision: https://phab.mercurial-scm.org/D9832

perf: use the `perf--` prefix for perf command This is the one command namespace where they should not be any ambiguity about command that should be in it. The perf extensions is only adding performance related command. so this is a good ground to start putting dash folding to the tests. Differential Revision: https://phab.mercurial-scm.org/D9516

contrib: update PyOxidizer to 0.10.3 This is necessary to work around a bug that caused build failures on current stable with 0.9.0. This patch was used to build the 5.7rc0 Windows installers. Differential Revision: https://phab.mercurial-scm.org/D9858

contrib: stop building rust for every job This is just wasteful for all steps that do not use Rust. Differential Revision: https://phab.mercurial-scm.org/D9717

share-safe: fix an abort message that references the experimental requirement Differential Revision: https://phab.mercurial-scm.org/D9851

doc: fix a formatting error in requirements.txt Differential Revision: https://phab.mercurial-scm.org/D9850