fix a couple of issues wrt to configuring move/mvbox behaviour in tests

python/src/deltachat/account.py

@@ -58,7 +58,6 @@ class Account(object):
         atexit.register(self.shutdown)
         self._shutdown_event = Event()
 
-
     @hookspec.account_hookimpl
     def process_ffi_event(self, ffi_event):
         name = ffi_event.name

python/src/deltachat/hookspec.py

@@ -68,4 +68,3 @@ class Global:
     @global_hookspec
     def account_after_shutdown(self, account, dc_context):
         """ Called after the account has been shutdown. """
-