nixos/upower: drop resumeCommands hack

Introduced 7 years ago, it's likely the issue has
been fixed. Even possible this could cause issues
with recent upower.

nixos/modules/services/hardware/upower.nix

@@ -54,15 +54,6 @@ in
 
     systemd.packages = [ cfg.package ];
 
-    # The upower daemon seems to get stuck after doing a suspend
-    # (i.e. subsequent suspend requests will say "Sleep has already
-    # been requested and is pending").  So as a workaround, restart
-    # the daemon.
-    powerManagement.resumeCommands =
-      ''
-        ${config.systemd.package}/bin/systemctl try-restart upower
-      '';
-
   };
 
 }