Revert "Physics (#3452)"

This reverts commit 3e64fd56a1.

Content.Shared/Physics/VaporController.cs

@@ -0,0 +1,14 @@
+#nullable enable
+using Robust.Shared.Maths;
+using Robust.Shared.Physics;
+
+namespace Content.Shared.Physics
+{
+    public class VaporController : VirtualController
+    {
+        public void Move(Vector2 velocityDirection, float speed)
+        {
+            LinearVelocity = velocityDirection * speed;
+        }
+    }
+}