Remove the confusing except clause in the threading wait docstring

Author: pelson

Doc/library/threading.rst

@@ -992,9 +992,8 @@ method.  The :meth:`~Event.wait` method blocks until the flag is true.
       (or fractions thereof).
 
       This method returns ``True`` if and only if the internal flag has been set to
-      true, either before the wait call or after the wait starts, so it will
-      always return ``True`` except if a timeout is given and the operation
-      times out. If such a timeout occurs, ``False`` will be returned.
+      true, either before the wait call or after the wait starts.
+      If a timeout is given and the operation times out, ``False`` will be returned.
 
       .. versionchanged:: 3.1
          Previously, the method always returned ``None``.