extensions: remove the inotify extension (BC)
This extension has always had correctness issues and has been
unmaintained for years. It is now removed in favor of the third-party
hgwatchman which is maintained and appears to be correct.
Users with inotify enabled in their config files will fall back to
standard status performance.
basic test for hg debugrebuildstate
$ hg init repo
$ cd repo
$ touch foo bar
$ hg ci -Am 'add foo bar'
adding bar
adding foo
$ touch baz
$ hg add baz
$ hg rm bar
$ hg debugrebuildstate
state dump after
$ hg debugstate --nodates | sort
n 644 -1 bar
n 644 -1 foo
status
$ hg st -A
! bar
? baz
C foo
$ cd ..