Remove redundant #nullable enable (#4275)

Content.Shared/Interaction/Helpers/SharedUnobstructedExtensions.cs

@@ -1,4 +1,3 @@
-#nullable enable
 using Content.Shared.DragDrop;
 using Content.Shared.Physics;
 using Robust.Shared.Containers;

Content.Shared/Interaction/Helpers/SharedUnoccludedExtensions.cs

@@ -1,5 +1,4 @@
-#nullable enable
-using Content.Shared.DragDrop;
+using Content.Shared.DragDrop;
 using Content.Shared.Examine;
 using Robust.Shared.Containers;
 using Robust.Shared.GameObjects;

Content.Shared/Interaction/IAfterInteract.cs

@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Threading.Tasks;
 using JetBrains.Annotations;
@@ -6,7 +5,6 @@ using Robust.Shared.Analyzers;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Map;
 
-#nullable enable
 
 namespace Content.Shared.Interaction
 {

Content.Shared/Interaction/ITargetedInteractEventArgs.cs

@@ -1,5 +1,4 @@
-#nullable enable
-using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects;
 
 namespace Content.Shared.Interaction
 {