Lint fixes

app/post_test.go

@@ -3067,8 +3067,6 @@ func TestGetTopDMsForUserSince(t *testing.T) {
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
-	th.Server.configStore.SetReadOnlyFF(false)
-	defer th.Server.configStore.SetReadOnlyFF(true)
 	th.App.UpdateConfig(func(cfg *model.Config) { cfg.FeatureFlags.InsightsEnabled = true })
 
 	// users