AFAIK, the files in EdgeCore folder are shared between the browser and WebView products owned by Microsoft to save disk space across products using the same binaries. I think it's by design that Edge is installed with EdgeCore folder in certain OS. We can't control folder creation in Edge installation, and it's not recommended to remove any file in Edge installation folder.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.