Create an action of the type "Replace with regular expression" for the field with the string (you don't say which it would be)
Search string: ^A |The |An
Replace with:
(leave empty)
For more details about regular expressions, see the documentation:
I, for myself have abandoned the idea to remove the articles.
Otherwise artist names like
The The
The Band
The Duke & the King
The Weeknd
A Fine Frenzy
A Flock of Seagulls
A Guy called Gerald
A Mountain of One
A Tribe called Quest
would look and sound strange.
Where I removed the article, though was for artists who did not really know what their name was: The Rolling Stones or just Rolling Stones, the same with "The Beatles".
In short I would not let such an action run unattended on all my tracks.