Cleanup the namespaces (#8132)

Content.Server/MachineLinking/Events/PortDisconnectedEvent.cs

@@ -1,5 +1,3 @@
-using Robust.Shared.GameObjects;
-
 namespace Content.Server.MachineLinking.Events
 {
     public sealed class PortDisconnectedEvent : EntityEventArgs

Content.Server/MachineLinking/Events/SignalReceivedEvent.cs

@@ -1,5 +1,3 @@
-using Robust.Shared.GameObjects;
-
 namespace Content.Server.MachineLinking.Events
 {
     public sealed class SignalReceivedEvent : EntityEventArgs

Content.Server/MachineLinking/Exceptions/InvalidPortValueException.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Content.Server.MachineLinking.Exceptions
 {
     public sealed class InvalidPortValueException : Exception

Content.Server/MachineLinking/Exceptions/LinkAlreadyRegisteredException.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace Content.Server.MachineLinking.Exceptions
+namespace Content.Server.MachineLinking.Exceptions
 {
     public sealed class LinkAlreadyRegisteredException : Exception
     {

Content.Server/MachineLinking/Exceptions/NoSignalValueProvidedException.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Content.Server.MachineLinking.Exceptions
 {
     public sealed class NoSignalValueProvidedException : Exception

Content.Server/MachineLinking/Exceptions/PortNotFoundException.cs

@@ -1,5 +1,3 @@
-using System;
-
 namespace Content.Server.MachineLinking.Exceptions
 {
     public sealed class PortNotFoundException : Exception

Content.Server/MachineLinking/System/TwoWayLeverSystem.cs

@@ -1,4 +1,3 @@
-using System;
 using Content.Server.MachineLinking.Components;
 using Content.Shared.Interaction;
 using Content.Shared.MachineLinking;