Remove unused thread handle entry from the apartment structure.

dlls/ole32/compobj.c

@@ -224,9 +224,6 @@ static APARTMENT *apartment_construct(DWORD model)
 
     apt = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*apt));
     apt->tid = GetCurrentThreadId();
-    DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
-                    GetCurrentProcess(), &apt->thread,
-                    THREAD_ALL_ACCESS, FALSE, 0);
 
     list_init(&apt->proxies);
     list_init(&apt->stubmgrs);
@@ -360,7 +357,6 @@ DWORD apartment_release(struct apartment *apt)
 
         DEBUG_CLEAR_CRITSEC_NAME(&apt->cs);
         DeleteCriticalSection(&apt->cs);
-        CloseHandle(apt->thread);
 
         HeapFree(GetProcessHeap(), 0, apt);
     }

dlls/ole32/compobj_private.h

@@ -127,7 +127,6 @@ struct apartment
   LONG  refs;              /* refcount of the apartment (LOCK) */
   DWORD model;             /* threading model (RO) */
   DWORD tid;               /* thread id (RO) */
-  HANDLE thread;           /* thread handle (RO) */
   OXID oxid;               /* object exporter ID (RO) */
   LONG ipidc;              /* interface pointer ID counter, starts at 1 (LOCK) */
   HWND win;                /* message window (RO) */