place settings custom fields

hi,

I am wondering how could I get rid of some of the fields on add listing page.
they all seem to be locked in because it is not possible to remove them through settings.

for example I need a better opening hours schedule than the one included in the theme,so I will buy the plugin that is available. now, if that does not replace the original “time” custom field, I will need to remove it myself since I will not need it anymore.

so anyway if I dont need all of them is there a way to remove some of the fields?

thanx