Removed old TODO. (0.21.7)

TODO

@@ -1,15 +0,0 @@
-Things to do in no particular order:
-
-- Implement error handling at all needed places! currently nearly no error handling is done!
-- Configure the logger
-- Make use of the logger wherever it us useful! and be informative when information really helps debugging the application!
-- Multicore support when scheduling jobs with APScheduler
-- Parent alerting (escalation)
-- Core error alerting to [linspector]->members on internal errors
-- Hostgroup parents (example: if the hostgroup "network" is down, don't alert for the hosts in that network)
-- Add more services
-- Add more tasks e.g. storage in mongodb or mariadb and some more notifications like XMPP and SMS
-- Check for all required configuration options and set defaults in services.
-- Write documentation and inline documentation.
-- Add kwargs to notifications, tasks and maybe plugins.
-- Add date and cron based scheduling to linspector.py to make the full use of APScheduler.