Remove comments which are no longer relevant

src/freedombone-app-pleroma

 #                    Freedom in the Cloud
 #
 # Pleroma backend application
-# https://git.pleroma.social/pleroma/pleroma/wikis/Installing-on-Debian-Based-Distributions
-#
-# Show stopper: This is dependent on https://placehold.it for avatar images,
-# so at present it's not usable until a first party placeholder image system
-# is included.
-#
-# There is also a possible issue with the chat system which uses an object called
-# "Agent" which may not be supported with the version of elixir within the
-# Debian package. This only applies if you're installing from the latest commit.
 #
 # License
 # =======