LibCore: Remove the Core::Objects::all_objects() list

Nobody actually used the list of all Core::Objects anyway.

Userland/Libraries/LibCore/Object.cpp

@@ -15,16 +15,9 @@
 
 namespace Core {
 
-IntrusiveList<&Object::m_all_objects_list_node>& Object::all_objects()
-{
-    static IntrusiveList<&Object::m_all_objects_list_node> objects;
-    return objects;
-}
-
 Object::Object(Object* parent)
     : m_parent(parent)
 {
-    all_objects().append(*this);
     if (m_parent)
         m_parent->add_child(*this);
 }
@@ -39,7 +32,6 @@ Object::~Object()
     for (auto& child : children)
         child->m_parent = nullptr;
 
-    all_objects().remove(*this);
     stop_timer();
     if (m_parent)
         m_parent->remove_child(*this);

Userland/Libraries/LibCore/Object.h

@@ -11,7 +11,6 @@
 #include <AK/Forward.h>
 #include <AK/Function.h>
 #include <AK/HashMap.h>
-#include <AK/IntrusiveList.h>
 #include <AK/Noncopyable.h>
 #include <AK/OwnPtr.h>
 #include <AK/StringView.h>
@@ -60,8 +59,6 @@ class Object
     AK_MAKE_NONCOPYABLE(Object);
     AK_MAKE_NONMOVABLE(Object);
 
-    IntrusiveListNode<Object> m_all_objects_list_node;
-
 public:
     virtual ~Object();
 
@@ -135,8 +132,6 @@ public:
 
     void deferred_invoke(Function<void()>);
 
-    static IntrusiveList<&Object::m_all_objects_list_node>& all_objects();
-
     void dispatch_event(Core::Event&, Object* stay_within = nullptr);
 
     void remove_from_parent()

Userland/Services/WindowServer/Window.h

@@ -8,6 +8,7 @@
 
 #include "HitTestResult.h"
 #include <AK/DeprecatedString.h>
+#include <AK/IntrusiveList.h>
 #include <AK/WeakPtr.h>
 #include <LibCore/Object.h>
 #include <LibGfx/Bitmap.h>

Userland/Shell/Shell.h

@@ -12,6 +12,7 @@
 #include <AK/CircularQueue.h>
 #include <AK/DeprecatedString.h>
 #include <AK/HashMap.h>
+#include <AK/IntrusiveList.h>
 #include <AK/StackInfo.h>
 #include <AK/StringBuilder.h>
 #include <AK/StringView.h>