Drop useless `mut` in `KeysInterface::sign_holder_anchor_input`#1805

TheBlueMatt merged 1 commit intolightningdevkit:mainlightningdevkit/rust-lightning:mainfrom

TheBlueMatt:2022-10-remote-useless-mutTheBlueMatt/rust-lightning:2022-10-remote-useless-mutCopy head branch name to clipboard