Removed old Loc.GetString() use instances (#4155)

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Content.Server/MachineLinking/Components/SignalTwoWayLeverComponent.cs

@@ -1,4 +1,4 @@
-#nullable enable
+#nullable enable
 using Content.Shared.Interaction;
 using Content.Shared.MachineLinking;
 using Content.Shared.Notification;
@@ -47,7 +47,7 @@ namespace Content.Server.MachineLinking.Components
 
             if (!TransmitSignal(State))
             {
-                Owner.PopupMessage(user, Loc.GetString("No receivers connected."));
+                Owner.PopupMessage(user, Loc.GetString("signal-two-way-lever-component-next-state-no-receivers-connected"));
             }
         }