Update homework 1 and 2

src/utils.rs

@@ -44,38 +44,3 @@ macro_rules! some_or_exit {
         }
     }};
 }
-
-pub trait Translate<S> {
-    type Target;
-    type Error;
-
-    fn translate(&mut self, source: &S) -> Result<Self::Target, Self::Error>;
-}
-
-pub trait Optimize<T> {
-    fn optimize(&mut self, code: &mut T) -> bool;
-}
-
-#[derive(Default)]
-pub struct Repeat<O> {
-    inner: O,
-}
-
-impl<T, O1: Optimize<T>, O2: Optimize<T>> Optimize<T> for (O1, O2) {
-    fn optimize(&mut self, code: &mut T) -> bool {
-        let changed1 = self.0.optimize(code);
-        let changed2 = self.1.optimize(code);
-        changed1 || changed2
-    }
-}
-
-impl<T, O: Optimize<T>> Optimize<T> for Repeat<O> {
-    fn optimize(&mut self, code: &mut T) -> bool {
-        if !self.inner.optimize(code) {
-            return false;
-        }
-
-        while self.inner.optimize(code) {}
-        true
-    }
-}