Move more tests using Cell to unit tests

src/test/ui/option-unwrap.rs

@@ -1,32 +0,0 @@
-// run-pass
-
-#![allow(non_camel_case_types)]
-use std::cell::Cell;
-
-struct dtor<'a> {
-    x: &'a Cell<isize>,
-}
-
-impl<'a> Drop for dtor<'a> {
-    fn drop(&mut self) {
-        self.x.set(self.x.get() - 1);
-    }
-}
-
-fn unwrap<T>(o: Option<T>) -> T {
-    match o {
-      Some(v) => v,
-      None => panic!()
-    }
-}
-
-pub fn main() {
-    let x = &Cell::new(1);
-
-    {
-        let b = Some(dtor { x:x });
-        let _c = unwrap(b);
-    }
-
-    assert_eq!(x.get(), 0);
-}