Remove unused parameters from method's docstring (#2738)

Author: hanouticelina

src/huggingface_hub/hf_api.py

@@ -5425,8 +5425,6 @@ def get_safetensors_metadata(
         Args:
             repo_id (`str`):
                 A user or an organization name and a repo name separated by a `/`.
-            filename (`str`):
-                The name of the file in the repo.
             repo_type (`str`, *optional*):
                 Set to `"dataset"` or `"space"` if the file is in a dataset or space, `None` or `"model"` if in a
                 model. Default is `None`.