Ignore mypy

python/mypy#1927
Signed-off-by: Yury Pliner <yury.pliner@gmail.com>

Author: Pliner

prometheus_client/context_managers.py

@@ -29,7 +29,7 @@ def __call__(self, f: "F") -> "F":
         def wrapped(*args: Any, **kwargs: Any) -> Any:
             with self:
                 return f(*args, **kwargs)
-        return wrapped
+        return wrapped  # type: ignore
 
 
 class InprogressTracker:
@@ -47,7 +47,7 @@ def __call__(self, f: "F") -> "F":
         def wrapped(*args: Any, **kwargs: Any) -> Any:
             with self:
                 return f(*args, **kwargs)
-        return wrapped
+        return wrapped  # type: ignore
 
 
 class Timer:
@@ -78,4 +78,4 @@ def wrapped(*args: Any, **kwargs: Any) -> Any:
             # ensures thread safety and reentrancy.
             with self._new_timer():
                 return f(*args, **kwargs)
-        return wrapped
+        return wrapped  # type: ignore