Re-enable TestPythonHello now that ptrace seccomp issue is resolved.

PiperOrigin-RevId: 218636184
Change-Id: I44deac3f32276d06955c5fb1e28c5970bb08f5fd

runsc/test/image/image_test.go

@@ -192,12 +192,6 @@ func TestMysql(t *testing.T) {
 }
 
 func TestPythonHello(t *testing.T) {
-	// TODO: This test occasionally hangs on the ptrace
-	// platform. Re-enable it once we have this issue fixed.
-	if testutil.IsPtracePlatform() {
-		t.Skipf("Skipping PythonHello test on ptrace platform")
-	}
-
 	if err := testutil.Pull("google/python-hello"); err != nil {
 		t.Fatalf("docker pull failed: %v", err)
 	}

runsc/test/testutil/docker.go

@@ -49,15 +49,6 @@ func IsPauseResumeSupported() bool {
 	return !strings.Contains(getRuntime(), "hostnet")
 }
 
-// IsPtracePlatform returns true if the runtime is using ptrace platform.
-//
-// TODO: Tests should not depend on the platform, but
-// TestPythonHello sometimes hangs on ptrace. Once that is debugged, this
-// method should go away.
-func IsPtracePlatform() bool {
-	return !strings.Contains(getRuntime(), "kvm")
-}
-
 // EnsureSupportedDockerVersion checks if correct docker is installed.
 func EnsureSupportedDockerVersion() {
 	cmd := exec.Command("docker", "version")