style(pool): use atexit.register decorator in place of function

Author: noxdafox

pebble/pool/process.py

@@ -490,6 +490,7 @@ def process_chunk(function: Callable, chunk: list) -> list:
     return [process_execute(function, *args) for args in chunk]
 
 
+@atexit.register
 def interpreter_shutdown():
     global GLOBAL_SHUTDOWN
     GLOBAL_SHUTDOWN = True
@@ -510,9 +511,6 @@ def dictionary_values(dictionary: dict) -> tuple:
             pass
 
 
-atexit.register(interpreter_shutdown)
-
-
 GLOBAL_SHUTDOWN = False
 WORKERS_NAME = 'pebble_pool_worker'
 PICKLING_ERRORS = AttributeError, pickle.PicklingError, TypeError