https://mods.factorio.com/mods/mISSAO/BlueprintRemover
No more clutter and a mess in your inventory. No questions asked. Just removal
The functionality is very basic, it deletes blueprints when it finds them. Usage: Make sure that when creating a blueprint, you place it in your library, as dropping it will erase it.
edit: my first ever mod

Based on suggestions from these threads:
viewtopic.php?f=23&t=44679
viewtopic.php?f=6&t=45761
viewtopic.php?f=6&t=45443
viewtopic.php?f=6&t=45476
viewtopic.php?f=6&t=45479
viewtopic.php?f=6&t=44881
viewtopic.php?f=6&t=44931
viewtopic.php?f=6&t=44681