diff --git a/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.cpp b/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.cpp
deleted file mode 100644
index b151c17990b..00000000000
--- a/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-
-#include "MainQueueProcessor.hpp"
-
-#include <atomic>
-
-#include "KAssert.h"
-
-#if KONAN_SUPPORTS_GRAND_CENTRAL_DISPATCH
-#include <dispatch/dispatch.h>
-#endif
-
-using namespace kotlin;
-
-namespace {
-
-#if KONAN_SUPPORTS_GRAND_CENTRAL_DISPATCH
-std::atomic<bool> isMainQueueProcessed = false;
-#endif
-
-} // namespace
-
-void kotlin::initializeMainQueueProcessor() noexcept {
-#if KONAN_SUPPORTS_GRAND_CENTRAL_DISPATCH
-    dispatch_async_f(
-            dispatch_get_main_queue(), nullptr, [](void*) { isMainQueueProcessed.store(true, std::memory_order_relaxed); });
-#endif
-}
-
-bool kotlin::isMainQueueProcessorAvailable() noexcept {
-#if KONAN_SUPPORTS_GRAND_CENTRAL_DISPATCH
-    return isMainQueueProcessed.load(std::memory_order_relaxed);
-#else
-    return false;
-#endif
-}
-
-void kotlin::runOnMainQueue(void* arg, void (*f)(void*)) noexcept {
-    RuntimeAssert(isMainQueueProcessorAvailable(), "Running on main queue when it's not processed");
-#if KONAN_SUPPORTS_GRAND_CENTRAL_DISPATCH
-    dispatch_async_f(dispatch_get_main_queue(), arg, f);
-#endif
-}
diff --git a/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.hpp b/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.hpp
deleted file mode 100644
index 1cdba27778b..00000000000
--- a/kotlin-native/runtime/src/main/cpp/MainQueueProcessor.hpp
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-
-#pragma once
-
-namespace kotlin {
-
-void initializeMainQueueProcessor() noexcept;
-
-bool isMainQueueProcessorAvailable() noexcept;
-
-// Run `f(arg)` on main queue without waiting for its completion.
-// Only valid if `isMainQueueProcessorAvailable()` returns true.
-void runOnMainQueue(void* arg, void (*f)(void*)) noexcept;
-
-} // namespace kotlin
diff --git a/kotlin-native/runtime/src/main/cpp/Runtime.cpp b/kotlin-native/runtime/src/main/cpp/Runtime.cpp
index 8091674e50e..02089493f5d 100644
--- a/kotlin-native/runtime/src/main/cpp/Runtime.cpp
+++ b/kotlin-native/runtime/src/main/cpp/Runtime.cpp
@@ -8,7 +8,6 @@
 #include "CompilerConstants.hpp"
 #include "Exceptions.h"
 #include "KAssert.h"
-#include "MainQueueProcessor.hpp"
 #include "Memory.h"
 #include "Logging.hpp"
 #include "ObjCExportInit.h"
@@ -171,9 +170,6 @@ bool kotlin::initializeGlobalRuntimeIfNeeded() noexcept {
     konan::consoleInit();
     logging::OnRuntimeInit();
     initGlobalMemory();
-    if (compiler::objcDisposeOnMain()) {
-        initializeMainQueueProcessor();
-    }
 #if KONAN_OBJC_INTEROP
     Kotlin_ObjCExport_initialize();
 #endif
diff --git a/kotlin-native/runtime/src/mm/cpp/ExtraObjectData.cpp b/kotlin-native/runtime/src/mm/cpp/ExtraObjectData.cpp
index d368b82a70f..03f13039dd2 100644
--- a/kotlin-native/runtime/src/mm/cpp/ExtraObjectData.cpp
+++ b/kotlin-native/runtime/src/mm/cpp/ExtraObjectData.cpp
@@ -5,7 +5,6 @@
 
 #include "ExtraObjectData.hpp"
 
-#include "MainQueueProcessor.hpp"
 #include "PointerBits.h"
 #include "ThreadData.hpp"
 
@@ -53,13 +52,7 @@ void mm::ExtraObjectData::UnlinkFromBaseObject() noexcept {
 void mm::ExtraObjectData::ReleaseAssociatedObject() noexcept {
 #ifdef KONAN_OBJC_INTEROP
     if (void* associatedObject = associatedObject_) {
-        if (getFlag(FLAGS_RELEASE_ON_MAIN_QUEUE) && isMainQueueProcessorAvailable()) {
-            runOnMainQueue(associatedObject, [](void* obj) {
-                Kotlin_ObjCExport_releaseAssociatedObject(obj);
-            });
-        } else {
-            Kotlin_ObjCExport_releaseAssociatedObject(associatedObject);
-        }
+        Kotlin_ObjCExport_releaseAssociatedObject(associatedObject);
         associatedObject_ = nullptr;
     }
 #endif