tests/test-backwards-remove.t

largefiles: cleanup of warnings on errors getting largefiles

Especially the "no default or default-push path set in hgrc" was often very
misleading and didn't give any hint where it actually was looking.

A long error messages is better than several multi-line messages.

  $ hg init
  $ echo This is file a1 > a
  $ hg add a
  $ hg commit -m "commit #0"
  $ ls
  a
  $ echo This is file b1 > b
  $ hg add b
  $ hg commit -m "commit #1"
  $ hg co 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

B should disappear

  $ ls
  a