tests/test-issue1089.t

test-convert-git: drop a git warning that doesn't occur on Windows

I do see this on Linux with 1.7.7.6, but not on Windows with 1.9.5.msysgit.0.
Adding a (?) didn't work to conditionally ignore the line; I'm not sure if the
(glob) interferes with that.

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 (glob)
  $ 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 (glob)
  $ cd b

Relative delete:

  $ hg ci -m m ../a

  $ cd ..