Revert "Actions Rework" (#6888)

Content.Shared/PAI/PAIComponent.cs

@@ -1,5 +1,6 @@
-using Content.Shared.Actions.ActionTypes;
+using Robust.Shared.GameObjects;
 using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.PAI
 {
@@ -16,8 +17,6 @@ namespace Content.Shared.PAI
     [RegisterComponent, NetworkedComponent]
     public sealed class PAIComponent : Component
     {
-        [DataField("midiAction", required: true, serverOnly: true)] // server only, as it uses a server-BUI event !type
-        public InstantAction? MidiAction;
     }
 }