Remove Pincode Check option

Hello,

That part is coming from the ship rocket plugin, please try to check the settings of the plugin.
https://support.shiprocket.in/support/solutions/articles/43000526636-shiprocket-wordpress-app-help-document

Or try to add the below CSS code from the Appearance > Customize > Custom CSS, and check.

.single-product input#shiprocket_pincode_check, .single-product button#check_pincode {
    display: none;
}