Remove duplicate information in docstring

Author: Byron

Diff for: git/cmd.py

@@ -393,9 +393,6 @@ def refresh(cls, path: Union[None, PathLike] = None) -> bool:
 
         Called by the :func:`git.refresh` function in the top level ``__init__``.
 
-        This gets called by the :func:`git.refresh` function in the top-level
-        ``__init__``.
-
         :param path:
             Optional path to the git executable. If not absolute, it is resolved
             immediately, relative to the current directory. (See note below.)