Do abandoned breakers have to be removed from the service panel?
An “abandoned breaker” is a breaker laying in the bottom of a Walmart shopping cart, in the rain, the day after Christmas.
What you have is a “spare” breaker.
LOL, good one
Do have have a picture of the whole panel? It looks like the other breakers are Bryant.
It doesn’t have to be removed, but per recent NEC cycles, they have to be described on the panel directory as spares.