Yes, it's possible without deleting the sys_ui_form_section record.
The association between a form section and a form view is stored in the sys_ui_form records. If you want to remove the section from a specific view, remove or update the corresponding sys_ui_form record that references the sys_ui_form_section (using its sys_id) for that view. This unlinks the section from the form while keeping the sys_ui_form_section record intact, allowing it to be reused elsewhere.
If the section has no name, using the sys_id is the correct approach to identify the appropriate record.
