Remove explicit depends on transitive pip deps

These things were listed before we had jeepyb as its own things
(gerritlib in gerrit) and before jeepyb has pbr/requirements.txt
as it does now. With the move to pip install -U . in /opt/jeepyb,
there is no need to also ask puppet to manage these.

Change-Id: I7b521d03b3df8c0bde37586748769f160e615d31
Merge "Remove explicit depends on transitive pip deps"