bugfix - deinitialize is a background task it self end thus cannot await its completion first

src/tempus/Tempus.py

@@ -312,8 +312,8 @@ class Tempus(Device):
 
     async def _de_initialize(self):
         self.do_acquire = False
-        if self.background_task:
-            await self.background_task
+        # if self.background_task:
+        #     await self.background_task
 
         try:
             await self.send_command("os.system('devmem2 0x80010004 w 0x2')")