Disable Vendors From Selecting Their Category

Please try this PHP snippet instead

add_filter( 
	'hivepress/v1/models/vendor/fields', 
	function ($fields, $model){
		$fields['categories']['required']=false;
		return $fields;
	},
	1000,
	2 
);

add_filter( 
	'hivepress/v1/forms/user_update_profile', 
	function ($form){
		unset($form['fields']['categories']);
		return $form;
	},
	1000,
	2 
);