The 26-year-old was due to face Chris Eubank Jr in early October but the fight was postponed just days before after Benn returned a test for banned substance clomiphene, which elevates testosterone levels in men.
Co-promoters Matchroom and Wasserman Boxing conceded defeat in their attempts to stage the catchweight meeting at the O2 Arena in defiance of the BBBofC declaring it was "prohibited" and "not in the interests of boxing".
The bout was intended to be a continuation of the Benn vs Eubank feud that saw the rivals' fathers battle it out in two ferocious contests in the early 1990s.
A statement, released by the BBBoC read: "Conor Benn was called by the Board of the BBBofC to attend a hearing to deal with allegations of misconduct pursuant to Rule 25.1.1. The hearing took place on 21st October 2022.
"On the morning of the hearing, Mr Benn voluntarily relinquished his licence with the BBBofC.
"In accordance with its Rules and Regulations, the Board determined the allegations following the hearing at which Mr. Benn was legally represented.
"The allegations of misconduct against Mr. Benn were upheld."