Use ellipsis replace pass to avoid potential warning:
```
	"resource": "/d:/Github/Python/python-patterns/patterns/creational/factory.py",
	"owner": "pylance4",
		"value": "reportReturnType",
			"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportReturnType.md",
	"severity": 8,
	"message": "Function with declared return type \"str\" must return value on all code paths\n \"None\" is not assignable to \"str\"",
	"source": "Pylance",
	"startLineNumber": 29,
	"startColumn": 37,
	"endLineNumber": 29,
	"endColumn": 40,
	"origin": "extHost1"
}]
```
Using VS Code with Pylance, Python debugger, and Black Formatter.

* Remove pluggable-libs submodule and cleanup (#433)
* Fix GitHub Actions output format error for multiline file lists
* Add requirements-dev.txt so CI can install dev dependencies

* Remove pluggable-libs submodule and cleanup (#433)
* Fix GitHub Actions output format error for multiline file lists
* Add requirements-dev.txt so CI can install dev dependencies
---------
Co-authored-by: Sakis Kasampalis <faif@users.noreply.github.com>

Co-authored-by: Benjamin Townsend <germin8@jamminangels.net>
Co-authored-by: Sakis Kasampalis <faif@users.noreply.github.com>

* Adding typehint
* Update __exit__ type
* fix black formatting
---------
Co-authored-by: Roy, Debakar <debakar.roy@intel.com>
Co-authored-by: Sakis Kasampalis <faif@users.noreply.github.com>