[Bug 57375] New: Remove some env vars for windowing libraries

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57375

Bug ID: 57375
           Summary: Remove some env vars for windowing libraries
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Libraries such as SDL2 allow you to set the backend to attempt to use via env
var
A lot of games/programs do not error check and when these are set, the program
will then error silently
It would be nice to unset some env vars to prevent this from happening, this
could be done with a tab in winecfg which could also be used to set vars per
wine config
The defaults to remove I'm proposing are XDG_SESSION_TYPE and SDL_VIDEODRIVER