match: remove doc about undefined behavior of visitdir()
This was added by 8545bd381504, but core matchers support visitdir() of
arbitrary locations since 2773540c3650, and verifier._verifymanifest()
doesn't seem to strictly obey the restriction.
I have no idea how important this API contract is for third-party extensions.
That's why this patch is RFC.
--- a/mercurial/match.py Thu Nov 30 15:48:42 2017 -0500
+++ b/mercurial/match.py Thu Nov 30 22:32:13 2017 +0900
@@ -305,9 +305,6 @@
Returns the string 'all' if the given directory and all subdirectories
should be visited. Otherwise returns True or False indicating whether
the given directory should be visited.
-
- This function's behavior is undefined if it has returned False for
- one of the dir's parent directories.
'''
return True