Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
If you want to remove your Google Analytics account, you’ll have to reconnect the Google service again in the plugin. This time, please remove the current Rank Math permissions first here: https://myaccount.google.com/permissions
After that, reconnect your Google account from WordPress Dashboard > Rank Math > General Settings > Analytics and ensure that you don’t accept any permissions that are related to Google Analytics.

Once done, please proceed with setting up only the GSC and save the settings. This should ensure that the Google Analytics account isn’t connected to the plugin.
Hope that helps and please don’t hesitate to let us know if you have any other questions.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.