treewide: remove the-kenny from maintainers

@the-kenny did a good job in the past and is set as maintainer in many package,
however since 2017-2018 he stopped contributing. To create less confusion
in pull requests when people try to request his feedback, I removed him as
maintainer from all packages.

pkgs/os-specific/linux/ldm/default.nix

@@ -38,7 +38,6 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.mit;
 
     platforms = stdenv.lib.platforms.linux;
-    maintainers = [ stdenv.lib.maintainers.the-kenny ];
     repositories.git = git;
   };
 }