bcachefs-tools: remove johnrtitor as maintainer

I have moved to ext4 LVM to look for stability.
After constant breaking changes for the past 6 months, even in mid rc kernel, and with each kernel update requiring fscks (and data corruption), I have decided to give in. Due to me no longer using bcachefs, I don't think I can be a maintainer of this.

I am still willing to merge non-complex updates and such if necesary, but keep in mind that I can not test them.

pkgs/by-name/bc/bcachefs-tools/package.nix

@@ -130,7 +130,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl2Only;
     maintainers = with lib.maintainers; [
       davidak
-      johnrtitor
       Madouura
     ];
     platforms = lib.platforms.linux;