Revert "Physics (#3452)"

This reverts commit 3e64fd56a1.

Content.Shared/GameObjects/Components/Movement/TileFrictionModifier.cs

@@ -1,62 +0,0 @@
-#nullable enable
-using System;
-using Robust.Shared.GameObjects;
-using Robust.Shared.Maths;
-using Robust.Shared.Players;
-using Robust.Shared.Serialization;
-using Robust.Shared.ViewVariables;
-
-namespace Content.Shared.GameObjects.Components.Movement
-{
-    [RegisterComponent]
-    public class SharedTileFrictionModifier : Component
-    {
-        public override string Name => "TileFrictionModifier";
-
-        /// <summary>
-        ///     Multiply the tilefriction cvar by this to get the body's actual tilefriction.
-        /// </summary>
-        [ViewVariables(VVAccess.ReadWrite)]
-        public float Modifier
-        {
-            get => _modifier;
-            set
-            {
-                if (MathHelper.CloseTo(_modifier, value)) return;
-
-                _modifier = value;
-            }
-        }
-
-        private float _modifier;
-
-        public override void ExposeData(ObjectSerializer serializer)
-        {
-            base.ExposeData(serializer);
-            serializer.DataField(this, x => x.Modifier, "modifier", 1.0f);
-        }
-
-        public override ComponentState GetComponentState(ICommonSession session)
-        {
-            return new TileFrictionComponentState(_modifier);
-        }
-
-        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
-        {
-            base.HandleComponentState(curState, nextState);
-            if (curState is not TileFrictionComponentState tileState) return;
-            _modifier = tileState.Modifier;
-        }
-
-        [NetSerializable, Serializable]
-        protected class TileFrictionComponentState : ComponentState
-        {
-            public float Modifier;
-
-            public TileFrictionComponentState(float modifier) : base(ContentNetIDs.TILE_FRICTION)
-            {
-                Modifier = modifier;
-            }
-        }
-    }
-}