Remove configuration documentation for deprecated/removed Watchlist feature

#-------------------------------------------------------------------------------------
# WatchList
#-------------------------------------------------------------------------------------

#-# [Since 10.0]
#-# [Since 9.11.2]
#-# Controls if the notifications feature is enabled. Default value is false.
#-# Thanks to this option, you can disable the application without uninstalling it.
# watchlist.enabled = false

#-# [Since 7.0RC1]
#-# Controls if the realtime notifications feature is enabled. Default value is false.
#-# This is currently an experimental feature which is not yet ready for producton. Enabling it right now will cause
#-# performance issues.
#-# Once the feature stabilizes, it will be enabled by default and the option to disabled it will be removed.
# watchlist.realtime.enabled = false

#-# [Since 8.1M2]
#-# Controls if realtime notifications are triggered by remote events. Default value is false.
#-# Enable if you don't have watchlist loaded on all instances in cluster.
# watchlist.realtime.allowRemote = false