Remove IActionBlocker.CanMove (#4449)

* Remove IActionBlocker.CanMove

Ported the remainders over to using MovementAttemptEvent which should also help make mob movement a bit faster.

* Make that check faster

Content.Shared/MobState/Components/SharedMobStateComponent.cs

@@ -338,11 +338,6 @@ namespace Content.Shared.MobState.Components
             return CurrentState?.CanInteract() ?? true;
         }
 
-        bool IActionBlocker.CanMove()
-        {
-            return CurrentState?.CanMove() ?? true;
-        }
-
         bool IActionBlocker.CanUse()
         {
             return CurrentState?.CanUse() ?? true;