Removing third party customizations from site

I’ve recently migrated a WordPress site from a third party provider to our own hosting provider. With the exported site, a chat bubble in the lower right corner of the admin panel. This is meant for requesting support from the old third party provider. But this is not relevant in the new site. How do I remove this?

https://preview.redd.it/gpw5vldhs7ea1.png?width=2758&format=png&auto=webp&v=enabled&s=4456703c2851908a9324dcc834f7443054ed73a6

 

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