fix when os.Remove should be os.RemoveAll

Signed-off-by: Jess Frazelle <acidburn@google.com>

pkg/kubelet/cm/container_manager_linux_test.go

@@ -152,6 +152,7 @@ func TestSoftRequirementsValidationSuccess(t *testing.T) {
 	req := require.New(t)
 	tempDir, err := ioutil.TempDir("", "")
 	req.NoError(err)
+	defer os.RemoveAll(tempDir)
 	req.NoError(ioutil.WriteFile(path.Join(tempDir, "cpu.cfs_period_us"), []byte("0"), os.ModePerm))
 	req.NoError(ioutil.WriteFile(path.Join(tempDir, "cpu.cfs_quota_us"), []byte("0"), os.ModePerm))
 	mountInt := &fakeMountInterface{