avoid changing git-annex info behavior

avoid changing git-annex info behavior

5afbea25e7751a8841ac42db3822b81ea68f31c1 changed it to ignore journal
files that did not correspond to a key in the git-annex branch. However,
when there is a private journal, that can happen.

Neither behavior is fully correct, so keep the old incorrect behavior
rather than introducing a new differently incorrect behavior.

I plan to eventually make git-annex info use Annex.reposizes instead of
calculating it itself, and once Annex.reposizes handles this all
correctly, this will be a moot problem.