Remove IMoveSpeedModifier in favor of events (#5212)

* Remove IMoveSpeedModifier

* fucking magboots

* yope

* rabiews

Content.Client/Clothing/MagbootsSystem.cs

@@ -0,0 +1,21 @@
+using Content.Shared.Clothing;
+using Content.Shared.Movement.EntitySystems;
+using Robust.Shared.GameObjects;
+
+namespace Content.Client.Clothing
+{
+    public class MagbootsSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<MagbootsComponent, RefreshMovementSpeedModifiersEvent>(OnRefreshMovespeed);
+        }
+
+        private void OnRefreshMovespeed(EntityUid uid, MagbootsComponent component, RefreshMovementSpeedModifiersEvent args)
+        {
+            args.ModifySpeed(component.WalkSpeedModifier, component.SprintSpeedModifier);
+        }
+    }
+}