Fix MouseRotator on rotated grids (#29663)

* fix harm mode rotation

* cleanup

* -pi to pi

Content.Shared/MouseRotator/MouseRotatorComponent.cs

@@ -30,8 +30,7 @@ public sealed partial class MouseRotatorComponent : Component
     public double RotationSpeed = float.MaxValue;
 
     /// <summary>
-    ///     This one is important. If this is true, <see cref="AngleTolerance"/> does not apply, and the system will
-    ///     use <see cref="RequestMouseRotatorRotationSimpleEvent"/> instead. In this mode, the client will only send
+    ///     This one is important. If this is true, <see cref="AngleTolerance"/> does not apply. In this mode, the client will only send
     ///     events when an entity should snap to a different cardinal direction, rather than for every angle change.
     ///
     ///     This is useful for cases like humans, where what really matters is the visual sprite direction, as opposed to something
@@ -50,13 +49,3 @@ public sealed class RequestMouseRotatorRotationEvent : EntityEventArgs
 {
     public Angle Rotation;
 }
-
-/// <summary>
-///     Simpler version of <see cref="RequestMouseRotatorRotationEvent"/> for implementations
-///     that only require snapping to 4-dir and not full angle rotation.
-/// </summary>
-[Serializable, NetSerializable]
-public sealed class RequestMouseRotatorRotationSimpleEvent : EntityEventArgs
-{
-    public Direction Direction;
-}