diff --git a/Userland/Libraries/LibJS/CMakeLists.txt b/Userland/Libraries/LibJS/CMakeLists.txt
index ce9e02a252..9e92ef1343 100644
--- a/Userland/Libraries/LibJS/CMakeLists.txt
+++ b/Userland/Libraries/LibJS/CMakeLists.txt
@@ -129,7 +129,6 @@ set(SOURCES
     Runtime/MapIterator.cpp
     Runtime/MapIteratorPrototype.cpp
     Runtime/MapPrototype.cpp
-    Runtime/MarkedValueList.cpp
     Runtime/MathObject.cpp
     Runtime/ModuleEnvironment.cpp
     Runtime/ModuleNamespaceObject.cpp
diff --git a/Userland/Libraries/LibJS/Forward.h b/Userland/Libraries/LibJS/Forward.h
index 560a07db2a..9dc79c9efe 100644
--- a/Userland/Libraries/LibJS/Forward.h
+++ b/Userland/Libraries/LibJS/Forward.h
@@ -159,7 +159,6 @@ class HandleImpl;
 class Heap;
 class HeapBlock;
 class Interpreter;
-class MarkedValueList;
 class Module;
 class NativeFunction;
 class ObjectEnvironment;
diff --git a/Userland/Libraries/LibJS/Heap/Heap.cpp b/Userland/Libraries/LibJS/Heap/Heap.cpp
index 4b0ed04c04..9d68374fbc 100644
--- a/Userland/Libraries/LibJS/Heap/Heap.cpp
+++ b/Userland/Libraries/LibJS/Heap/Heap.cpp
@@ -113,13 +113,6 @@ void Heap::gather_roots(HashTable<Cell*>& roots)
     for (auto& handle : m_handles)
         roots.set(handle.cell());
 
-    for (auto& list : m_marked_value_lists) {
-        for (auto& value : list.values()) {
-            if (value.is_cell())
-                roots.set(&value.as_cell());
-        }
-    }
-
     for (auto& vector : m_marked_vectors)
         vector.gather_roots(roots);
 
@@ -293,18 +286,6 @@ void Heap::did_destroy_handle(Badge<HandleImpl>, HandleImpl& impl)
     m_handles.remove(impl);
 }
 
-void Heap::did_create_marked_value_list(Badge<MarkedValueList>, MarkedValueList& list)
-{
-    VERIFY(!m_marked_value_lists.contains(list));
-    m_marked_value_lists.append(list);
-}
-
-void Heap::did_destroy_marked_value_list(Badge<MarkedValueList>, MarkedValueList& list)
-{
-    VERIFY(m_marked_value_lists.contains(list));
-    m_marked_value_lists.remove(list);
-}
-
 void Heap::did_create_marked_vector(Badge<MarkedVectorBase>, MarkedVectorBase& vector)
 {
     VERIFY(!m_marked_vectors.contains(vector));
diff --git a/Userland/Libraries/LibJS/Heap/Heap.h b/Userland/Libraries/LibJS/Heap/Heap.h
index 5edf1d341c..470f11a1af 100644
--- a/Userland/Libraries/LibJS/Heap/Heap.h
+++ b/Userland/Libraries/LibJS/Heap/Heap.h
@@ -20,7 +20,6 @@
 #include <LibJS/Heap/CellAllocator.h>
 #include <LibJS/Heap/Handle.h>
 #include <LibJS/Heap/MarkedVector.h>
-#include <LibJS/Runtime/MarkedValueList.h>
 #include <LibJS/Runtime/Object.h>
 #include <LibJS/Runtime/WeakContainer.h>
 
@@ -67,9 +66,6 @@ public:
     void did_create_handle(Badge<HandleImpl>, HandleImpl&);
     void did_destroy_handle(Badge<HandleImpl>, HandleImpl&);
 
-    void did_create_marked_value_list(Badge<MarkedValueList>, MarkedValueList&);
-    void did_destroy_marked_value_list(Badge<MarkedValueList>, MarkedValueList&);
-
     void did_create_marked_vector(Badge<MarkedVectorBase>, MarkedVectorBase&);
     void did_destroy_marked_vector(Badge<MarkedVectorBase>, MarkedVectorBase&);
 
@@ -112,10 +108,7 @@ private:
     Vector<NonnullOwnPtr<CellAllocator>> m_allocators;
 
     HandleImpl::List m_handles;
-
     MarkedVectorBase::List m_marked_vectors;
-    MarkedValueList::List m_marked_value_lists;
-
     WeakContainer::List m_weak_containers;
 
     Vector<Cell*> m_uprooted_cells;
diff --git a/Userland/Libraries/LibJS/Runtime/MarkedValueList.cpp b/Userland/Libraries/LibJS/Runtime/MarkedValueList.cpp
deleted file mode 100644
index 47ee03a4ce..0000000000
--- a/Userland/Libraries/LibJS/Runtime/MarkedValueList.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <LibJS/Heap/Heap.h>
-#include <LibJS/Heap/MarkedVector.h>
-
-namespace JS {
-
-MarkedValueList::MarkedValueList(Heap& heap)
-    : m_heap(&heap)
-{
-    m_heap->did_create_marked_value_list({}, *this);
-}
-
-MarkedValueList::MarkedValueList(MarkedValueList const& other)
-    : Vector<Value, 32>(other)
-    , m_heap(other.m_heap)
-{
-    m_heap->did_create_marked_value_list({}, *this);
-}
-
-MarkedValueList::MarkedValueList(MarkedValueList&& other)
-    : Vector<Value, 32>(move(static_cast<Vector<Value, 32>&>(other)))
-    , m_heap(other.m_heap)
-{
-    m_heap->did_create_marked_value_list({}, *this);
-}
-
-MarkedValueList::~MarkedValueList()
-{
-    m_heap->did_destroy_marked_value_list({}, *this);
-}
-
-MarkedValueList& MarkedValueList::operator=(JS::MarkedValueList const& other)
-{
-    Vector<Value, 32>::operator=(other);
-
-    if (m_heap != other.m_heap) {
-        m_heap = other.m_heap;
-
-        // NOTE: IntrusiveList will remove this MarkedValueList from the old heap it was part of.
-        m_heap->did_create_marked_value_list({}, *this);
-    }
-
-    return *this;
-}
-
-}
diff --git a/Userland/Libraries/LibJS/Runtime/MarkedValueList.h b/Userland/Libraries/LibJS/Runtime/MarkedValueList.h
deleted file mode 100644
index dbb5bdd49d..0000000000
--- a/Userland/Libraries/LibJS/Runtime/MarkedValueList.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#pragma once
-
-#include <AK/IntrusiveList.h>
-#include <AK/Noncopyable.h>
-#include <AK/Vector.h>
-#include <LibJS/Forward.h>
-#include <LibJS/Runtime/Value.h>
-
-namespace JS {
-
-class MarkedValueList : public Vector<Value, 32> {
-public:
-    explicit MarkedValueList(Heap&);
-    MarkedValueList(MarkedValueList const&);
-    MarkedValueList(MarkedValueList&&);
-    ~MarkedValueList();
-
-    Vector<Value, 32>& values() { return *this; }
-
-    MarkedValueList& operator=(JS::MarkedValueList const& other);
-
-private:
-    Heap* m_heap;
-
-    IntrusiveListNode<MarkedValueList> m_list_node;
-
-public:
-    using List = IntrusiveList<&MarkedValueList::m_list_node>;
-};
-
-}