Follow-up from "Look for vulkaninfo, wflinfo in SRT_HELPERS_PATH"

The following discussion from !77 (merged) should be addressed:

• @denittis started a discussion: (+2 comments)

  This MR didn't touch this code but it's near enough to your changes :)

  Why window_system is assigned here? Was it supposed to be an inout parameter? Because right now it is just assigned but never used again in this function.