Clean some function in docker_utils_test.go

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

integration-cli/docker_cli_commit_test.go

@@ -40,7 +40,6 @@ func (s *DockerSuite) TestCommitWithoutPause(c *check.C) {
 //test commit a paused container should not unpause it after commit
 func (s *DockerSuite) TestCommitPausedContainer(c *check.C) {
 	testRequires(c, DaemonIsLinux)
-	defer unpauseAllContainers(c)
 	out, _ := dockerCmd(c, "run", "-i", "-d", "busybox")
 
 	cleanedContainerID := strings.TrimSpace(out)