Grep query to delete [xxx]

Dear Friends,

Just recently had to replace my old legacy Adobe suite with Creative Cloud, on account of having to upgrade old 36 bit Mac Mini with 64 bit model. (Other old 36 bit legacy software no longer supported and needed to be upgraded.)

Forgot to make copies of dozens of Find/Replace Queries I had constructed over the Ages Gone By. One I very much need to reconstruct was a GREP string that would simply find a string:

open-square-bracket/any string of numerals/close-square-bracket. In plain text, the Find criterion would be: [xxx].

In my Find/Change Panel, I would "Find what" for the above string, and "Change to" a blank/nothing vaulue. Essentially, just deleting the Find Query.

Any help with writing the GREP Query would be greatly appreciated!

Yours,

Bucky Edgett