Remove pysispm as it currently breaks building the container and as it is unlikely that we actually need this library as it is for switching on/off power strips.
I've seen it mentioned first in c9fa2a ("Introduce osmo-gsm-tester docker setup") from where it apparently was copy pasted to debian 10, 11 and 12 containers afterwards c1f302c2 ("Add debian-buster-jenkins docker setup").
Remove pydbus as well, it was apparently copy pasted with the same history and isn't used in Osmocom software.
Fix for: #17 30.93 ERROR: Could not find a version that satisfies the requirement pysispm (from versions: none) #17 30.93 ERROR: No matching distribution found for pysispm
