Reduce knocked down players tile friction (#11035)

Content.Client/Friction/TileFrictionController.cs

@@ -1,15 +0,0 @@
-using Content.Client.Physics.Controllers;
-using Content.Shared.Friction;
-using Robust.Shared.GameObjects;
-
-namespace Content.Client.Friction
-{
-    public sealed class TileFrictionController : SharedTileFrictionController
-    {
-        public override void Initialize()
-        {
-            base.Initialize();
-            Mover = Get<MoverController>();
-        }
-    }
-}

Content.Client/Slippery/SlipperySystem.cs

@@ -1,9 +0,0 @@
-using Content.Shared.Slippery;
-
-namespace Content.Client.Slippery
-{
-    internal sealed class SlipperySystem : SharedSlipperySystem
-    {
-        protected override void PlaySound(SlipperyComponent component) {}
-    }
-}