Remove "Featuring" from title

I see posts on how to move the "featuring" strings to another tag, but how would I just remove it completely from the artist tag?

It depends ..., if you show us a real world example, then it would be easy to give a concrete answer.
In the meantime you can move the "featuring" part to a tagfield of your wish and in a following step remove this tagfield.

DD.20160130.1752.CET

The artist currently looks like

Robotic Pirate Monkey feat. Late Night Radio

or

Santana Featuring Dave Matthews

I want it to be

Robotic Pirate Monkey

Santana

respectively

Thank you!

Convert "Tag - Tag"
... or ...
Action "Format value
Field: ARTIST
Formatstring: $regexp(%ARTIST%,'^(.+?)\s+[[({]?(?:ft\.?|feat\.?|featuring)\s+(?:[^][(){}]+)[])}]?(\s*.+)?$','$1$2',1)

See also ...
Two $if functions for the title

DD.20160130.1810.CET