Remove unused line

update_streamlit_version.py

@@ -13,7 +13,6 @@ with pathlib.Path("requirements.txt").open() as requirements_txt:
 print(version)
 
 
-regex_pattern = re.compile(r"sdk_version:.*")
 with open("README.md", "r") as f:
     contents = f.read()
     replaced = re.sub(r"sdk_version:.*", f"sdk_version: {version}", contents, 1)