Fix issue #30201 – clean trust folder at the end of the test

This test doesn't clean the folder where it stores it's config (and
the trust folder), and thus, it fails if we run it more than
once (could also affect other tests at some point).

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

integration-cli/docker_cli_create_test.go

@@ -321,6 +321,7 @@ func (s *DockerTrustSuite) TestTrustedIsolatedCreate(c *check.C) {
 
 	// Try create
 	icmd.RunCmd(icmd.Command(dockerBinary, "--config", "/tmp/docker-isolated-create", "create", repoName), trustedCmd).Assert(c, SuccessTagging)
+	defer os.RemoveAll("/tmp/docker-isolated-create")
 
 	dockerCmd(c, "rmi", repoName)
 }