Solution Review: Deletion by Value

mod linked_list; 
use linked_list::*; 

impl LinkedList{
    pub fn delete(&mut self, elem: i32) -> bool {
       if self.head.as_ref().unwrap().data.unwrap() == elem{
            self.delete_at_head();
            return true;
        }
        let mut cur = self.head.as_mut().unwrap();
        while cur.next.is_some() && cur.next.as_ref().unwrap().data.unwrap() != elem {
            cur = cur.next.as_mut().unwrap();
        }
        if cur.next.is_some(){
            cur.next = cur.next.as_ref().unwrap().next.to_owned();
            return true; 
        }
        false
    }
}