[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

vine/synchronization.py

@@ -32,7 +32,7 @@ def all_done():
     Note that you cannot add new promises to a barrier after
     the barrier is fulfilled.
     """
-    __slots__ = (  # noqa
+    __slots__ = (
             'p', 'args', 'kwargs', '_value', 'size',
             'ready', 'reason', 'cancelled', 'finalized',
             '__weakref__',