It doesn't install anything, so there is nothing to revert. Your system will be untouched.
LIBGL_DRIVERS_PATH=some_path program
says that the 3D driver for the "program" is loaded from "some_path".
If you don't type "LIBGL_DRIVERS_PATH=some_path", the driver will be loaded from your default system location.
It doesn't install anything, so there is nothing to revert. Your system will be untouched.
LIBGL_DRIVERS_ PATH=some_ path program
says that the 3D driver for the "program" is loaded from "some_path".
If you don't type "LIBGL_ DRIVERS_ PATH=some_ path", the driver will be loaded from your default system location.