unit-test.py: Remove objmgr workaround

As was done in build-unit-test-docker.sh, this commit removes
a phosphor-objmgr workaround that was needed due to a systemd
dependency that doesn't exist anymore.

Tested: Ran run-unit-test-docker.sh.

Change-Id: Ica85023330a4e102f0ecc7e8b7b1c8bb411fb1e8
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed