Revert "Physics (#3452)"

This reverts commit 3e64fd56a1.

Content.Shared/GameObjects/Components/Mobs/SharedCombatModeComponent.cs

@@ -21,22 +21,8 @@ namespace Content.Shared.GameObjects.Components.Mobs
             get => _isInCombatMode;
             set
             {
-                if (_isInCombatMode == value) return;
                 _isInCombatMode = value;
                 Dirty();
-
-                // Regenerate physics contacts -> Can probably just selectively check
-                /* Still a bit jank so left disabled for now.
-                if (Owner.TryGetComponent(out PhysicsComponent? physicsComponent))
-                {
-                    if (value)
-                    {
-                        physicsComponent.WakeBody();
-                    }
-
-                    physicsComponent.RegenerateContacts();
-                }
-                */
             }
         }
 
@@ -46,7 +32,6 @@ namespace Content.Shared.GameObjects.Components.Mobs
             get => _activeZone;
             set
             {
-                if (_activeZone == value) return;
                 _activeZone = value;
                 Dirty();
             }