Fix unittest.mock.patch docstring

Lib/unittest/mock.py

@@ -1350,8 +1350,6 @@ def patch(
         spec_set=None, autospec=None, new_callable=None, **kwargs
     ):
     """
-    `patch` acts as a function decorator, class decorator or a context
-
     `patch` acts as a function decorator, class decorator or a context
     manager. Inside the body of the function or with statement, the `target`
     is patched with a `new` object. When the function/with statement exits