Is this the previous thread that you’re referring to? In general, the additional values don’t affect the way the events are displayed and used on your site. However if you do remove some of the additional meta associated with imported events, you could run into possible quirks with using the plugin such as events importing multiple times with auto imports turned on, ability to manually import events multiple times, events duplicated in the importing options.
This topic has not been active for quite some time and will now be closed.
If you still need assistance please simply open a new topic (linking to this one if necessary)
and one of the team will be only too happy to help.