cephfs: remove useMount test helper function

Now that there are no tests using the fuse mount point and the useMount
function that detects an external mount point is needed, we can remove
the useMount function itself and the env var used to control it.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

cephfs/cephfs_test.go

@@ -3,8 +3,6 @@ package cephfs
 import (
 	"fmt"
 	"os"
-	"path"
-	"syscall"
 	"testing"
 	"time"
 
@@ -15,54 +13,16 @@ import (
 )
 
 var (
-	CephMountDir     = "/tmp/ceph/mds/mnt/"
-	requireCephMount = false
-	testMdsName      = "Z"
+	testMdsName = "Z"
 )
 
 func init() {
-	mdir := os.Getenv("GO_CEPH_TEST_MOUNT_DIR")
-	if mdir != "" {
-		CephMountDir = mdir
-	}
-	reqMount := os.Getenv("GO_CEPH_TEST_REQUIRE_MOUNT")
-	if reqMount == "yes" || reqMount == "true" {
-		requireCephMount = true
-	}
 	mdsName := os.Getenv("GO_CEPH_TEST_MDS_NAME")
 	if mdsName != "" {
 		testMdsName = mdsName
 	}
 }
 
-func useMount(t *testing.T) {
-	fail := func(m string) {
-		if requireCephMount {
-			t.Fatalf("cephfs mount required: %s %s", CephMountDir, m)
-		} else {
-			t.Skipf("cephfs mount needed: %s %s", CephMountDir, m)
-		}
-	}
-
-	s, err := os.Stat(CephMountDir)
-	if err != nil || !s.IsDir() {
-		fail("missing or not a directory")
-	}
-
-	if us, ok := s.Sys().(*syscall.Stat_t); ok {
-		ps, err := os.Stat(path.Dir(path.Clean(CephMountDir)))
-		if err != nil {
-			fail("missing parent directory (race condition?)")
-		}
-		if ps.Sys().(*syscall.Stat_t).Dev == us.Dev {
-			fail("not a mount point")
-		}
-	} else {
-		fail("not a unix-like file system? how did you even compile this?" +
-			"no, seriously please contact us or file an issue and let us know!")
-	}
-}
-
 func TestCreateMount(t *testing.T) {
 	mount, err := CreateMount()
 	assert.NoError(t, err)