treewide: remove lethalman from meta.maintainers

He hasn't been heard of for years.

pkgs/servers/fcgiwrap/default.nix

@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     homepage = "https://nginx.localdomain.pl/wiki/FcgiWrap";
     description = "Simple server for running CGI applications over FastCGI";
-    maintainers = with maintainers; [ lethalman ];
+    maintainers = with maintainers; [ ];
     platforms = with platforms; linux;
     license = licenses.mit;
   };

pkgs/servers/ftp/pure-ftpd/default.nix

@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     description = "A free, secure, production-quality and standard-conformant FTP server";
     homepage = "https://www.pureftpd.org";
     license = licenses.isc; # with some parts covered by BSD3(?)
-    maintainers = [ maintainers.lethalman ];
+    maintainers = [ ];
     platforms = platforms.linux;
   };
 }

pkgs/servers/http/apache-modules/mod_dnssd/default.nix

@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     description = "Provide Zeroconf support via DNS-SD using Avahi";
     license = licenses.asl20;
     platforms = platforms.linux;
-    maintainers = with maintainers; [ lethalman ];
+    maintainers = with maintainers; [ ];
   };
 }