Ensure that `GIT_DIR` isn't set while running this test.
Ensure that `GIT_DIR` isn't set while running this test.

Fixes failure on DrDr. Also remove debugging output.

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket