GE-Proton: remove unused import

Author: sonic2kk

pupgui2/resources/ctmods/ctmod_00protonge.py

@@ -9,7 +9,7 @@
 from PySide6.QtWidgets import QMessageBox
 from PySide6.QtCore import QObject, QCoreApplication, Signal, Property
 
-from pupgui2.util import fetch_project_release_data, fetch_project_releases, ghapi_rlcheck, extract_tar
+from pupgui2.util import fetch_project_release_data, fetch_project_releases, extract_tar
 from pupgui2.util import build_headers_with_authorization
 from pupgui2.networkutil import download_file