librenms: remove fixed package name (#261395)

pkgs/servers/monitoring/librenms/default.nix

···
 let
   phpPackage = php82.withExtensions ({ enabled, all }: enabled ++ [ all.memcached ]);
 in phpPackage.buildComposerProject rec {
-  name = pname + "-" + version;
   pname = "librenms";
   version = "23.9.1";