Debugger: Remove a few unused enums

Change-Id: I45fe9aa14833dc1741552310dc911291ed444ff1
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/debugger/debuggerinternalconstants.h

@@ -3,8 +3,6 @@
 
 #pragma once
 
-#include <QtGlobal>
-
 namespace Debugger {
 
 namespace Constants {
@@ -61,11 +59,6 @@ enum ModelRoles
 {
     DisplaySourceRole = 32,  // Qt::UserRole
 
-    EngineStateRole,
-    EngineActionsEnabledRole,
-    RequestActivationRole,
-    RequestContextMenuRole,
-
     // Locals and Watchers
     LocalsINameRole,
     LocalsNameRole,