Hey there, @fahadurrehmankhan1, thank you for following up.
We have imported the form on a test install, this one is clean with default WP theme and only Hustle installed, in this case, I was able to delete those fields, so I was wondering if it would be possible for you to run a plugin conflict test on your site.
In order to do this, please disable plugins one by one, after you disable a plugin, test the issue, if it doesn’t work, then activate the inactive plugin and move to the next one until you find the one that creates the conflict.
It’s important to back up before starting this process.
Let us know how it goes.
Regards,
Jorge