test-removeemptydirs: adjust to Windows behavior for the `histedit` case
Windows stay in the "same" directory and the warning message is not applicable.
This make `tests/test-removeemptydirs.t` pass on Windows.
Differential Revision: https://phab.mercurial-scm.org/D11055
https://bz.mercurial-scm.org/1089
$ hg init
$ mkdir a
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ hg ci -m m a
$ mkdir a b
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ cd b
Relative delete:
$ hg ci -m m ../a
$ cd ..