[NTOS:MM] Remove obsolete code path

In MmCleanProcessAddressSpace we already delete VADs that are RosMm memory areas by calling MiRosCleanupMemoryArea, so we never reach the later check. This code path is from a time when VADs and memory areas lived in different tables, which is no longer the case.

ntoskrnl/mm/ARM3/procsup.c

@@ -1327,14 +1327,6 @@ MmCleanProcessAddressSpace(IN PEPROCESS Process)
             MiUnlockProcessWorkingSetUnsafe(Process, Thread);
         }
 
-         /* Skip ARM3 fake VADs, they'll be freed by MmDeleteProcessAddresSpace */
-        if (Vad->u.VadFlags.Spare == 1)
-        {
-            /* Set a flag so MmDeleteMemoryArea knows to free, but not to remove */
-            Vad->u.VadFlags.Spare = 2;
-            continue;
-        }
-
         /* Free the VAD memory */
         ExFreePool(Vad);