Removes long unused launcher.py.
Revert "Removes long unused launcher.py."

This reverts commit d4df92b7bb5c9ba62e7ce81acda20ffe25983534.
mend
Revert "mend"

This reverts commit 5d2aac7955d7737c5b464af563937a55339935c6.
Removes long unused launcher.py