pylint: Fix unused-{argument,variable} warning

This commit fixes 4 out of the remaining 5 pylint warnings:

$ pylint --rcfile=.pylintrc *.py
************* Module gitc_utils
W:146, 0: TODO(sbasi/jorg): Come up with a solution to remove the sleep below. (fixme)
W:130, 6: Unused variable 'name' (unused-variable)
************* Module main
W:382,32: Unused argument 'fp' (unused-argument)
W:382,36: Unused argument 'code' (unused-argument)
W:382,42: Unused argument 'msg' (unused-argument)

Change-Id: Ie3d77b9a65b7daefaa9aa4b80f4b682c1678fd58
Signed-off-by: Stefan Beller <sbeller@google.com>