fix lint issue

Author: yuyufei

pkg/prediction/dsp/estimators_test.go

@@ -70,4 +70,4 @@ func TestFftEstimator_GetEstimation(t *testing.T) {
 	})
 	fmt.Println("Open your browser and access 'http://localhost:7001'")
 	//http.ListenAndServe(":7001", nil)
-}
+}