Hiding "removed" lines from mock debug output

[Jason L Tibbitts III]

Would it be reasonable to consider eliminating the "removed `/blah'"
lines from mock's debug output or perhaps moving them to another debug
level?  They swamp the regular debug output (which is often quite
useful to watch) and crowd out other useful information in root.log.

I know I can always use grep or patch locally, but it gets a bit
tedious.

 - J<