Fix _setup_pipenv_minimal call by removing self

Author: Jason2866

platform.py

@@ -845,7 +845,7 @@ def configure_default_packages(self, variables: Dict, targets: List[str]) -> Uni
             core_dir = config.get("platformio", "core_dir")
 
             # Setup penv using minimal function (no SCons dependencies, esptool from tl-install)
-            penv_python, esptool_path = _setup_pipenv_minimal(self, core_dir)
+            penv_python, esptool_path = _setup_pipenv_minimal(core_dir)
 
             # Store both for later use
             self._penv_python = penv_python