- removed MarkACSThinker.

The global variable holding a pointer to this thinker should be a weak reference to the instance in the thinker chain, there is no need to mark this global variable, as the thinker's lifetime is only determined by the thinker chain.

- committed a few Posix related file the last commit missed.

src/dobjgc.cpp

@@ -79,8 +79,6 @@
 #include "g_levellocals.h"
 #include "events.h"
 
-void MarkACSThinker();
-
 // MACROS ------------------------------------------------------------------
 
 /*
@@ -331,7 +329,6 @@ static void MarkRoot()
 	Mark(DIntermissionController::CurrentIntermission);
 	DThinker::MarkRoots();
 	FCanvasTextureInfo::Mark();
-	MarkACSThinker();
 	Mark(E_FirstEventHandler);
 	Mark(E_LastEventHandler);
 	for (auto &s : level.sectorPortals)

src/dobjtype.cpp

@@ -242,7 +242,6 @@ void PClass::StaticShutdown ()
 {
 	if (WP_NOCHANGE != nullptr)
 	{
-		WP_NOCHANGE->ObjectFlags |= OF_YesReallyDelete;
 		delete WP_NOCHANGE;
 	}
 

src/p_acs.cpp

@@ -11022,11 +11022,6 @@ CCMD(acsprofile)
 	ShowProfileData(FuncProfiles, limit, sorter, true);
 }
 
-void MarkACSThinker()
-{
-	GC::Mark(DACSThinker::ActiveThinker);
-}
-
 ADD_STAT(ACS)
 {
 	return FStringf("ACS time: %f ms", ACSTime.TimeMS());

src/posix/cocoa/i_video.mm

@@ -632,7 +632,6 @@ DFrameBuffer* CocoaVideo::CreateFrameBuffer(const int width, const int height, c
 		}
 
 		old->GetFlash(flashColor, flashAmount);
-		old->ObjectFlags |= OF_YesReallyDelete;
 
 		if (old == screen)
 		{
@@ -1306,7 +1305,6 @@ void I_ShutdownGraphics()
 {
 	if (NULL != screen)
 	{
-		screen->ObjectFlags |= OF_YesReallyDelete;
 		delete screen;
 		screen = NULL;
 	}

src/posix/sdl/hardware.cpp

@@ -95,7 +95,6 @@ void I_ShutdownGraphics ()
 	{
 		DFrameBuffer *s = screen;
 		screen = NULL;
-		s->ObjectFlags |= OF_YesReallyDelete;
 		delete s;
 	}
 	if (Video)