[INTERNAL] removed syntactic sugar

The network layer should not know anything about Saros. Removed the
syntactic sugar methods which were only used in the class itself.

Change-Id: I67b0378437e4370bc65a6c8dbcbd57327719ad30
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1156
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>