tests: configfile: fix spurious test failure II
tests: configfile: fix spurious test failure II

internal/configfile/config_test.go:67: c declared and not used

rfjakob/gocryptfs,rfjakob/gocryptfs,rfjakob/gocryptfs,davesteele/gocryptfs,davesteele/gocryptfs,rfjakob/gocryptfs,davesteele/gocryptfs