Hi, Benjamin.
/wp-content/plugins/the-events-calendar-community-events/src/views/community/modules/image.php is the module loaded by Line 58 of /wp-content/plugins/the-events-calendar-community-events/src/views/community/edit-event.php
You could use our Themer’s Guide to customize the edit-event.php file to your liking (e.g. remove loading of that image.php module)
You could also add code there to use WordPress’ native media library.
If you do wish to custom code this, you might benefit from referencing https://code.tutsplus.com/articles/how-to-integrate-the-wordpress-media-uploader-in-theme-and-plugin-options–wp-26052 (not written or guaranteed by us).
I believe you’re requesting the same thing as one of our existing feature requests: https://tribe.uservoice.com/forums/195723-feature-ideas/suggestions/5620219-community-events-native-image-file-uploader-on-s
Please do add your vote there.
This allows us to gauge interest in this particular feature request, which helps us prioritize our development efforts.
Thank you.