how completely delete SG Optimizer plugin ?

Hello,

I reluctantly uninstalled your plugin due to an incompatibility with my site. But I just realized that on mobile on chrome or facebook, the bug menu (but works). On the other hand on the IOS mobile browser the menu works normally.

Here is my URL: https://www.goldlineorpaillage.fr

I have indeed noticed that even the SG Optimizer plugin removed, the calligraphy due to the activation of the google front option of the plugin still translates its presence which is a little bit different from the normal calligraphy of my theme.

My question is therefore simple, how to completely delete the data from the SG Optimizer plugin?

Thank you for your help.