Remove "quick listener check" and don't mute connection

[zstyblik]

Commit removes "quick listener check" which mutes connection and returns error when listener isn't available at the time of inicialization. It seems as this there is no need to scrap connection, because when remote endpoint comes around later, metrics will be received by that endpoint just fine.

Fixes #6

[hubertmine]

+1, had the same issue in tests but this has very little chance to happen in production