Fix a Clippy warning (clippy 0.1.53, rustc 1.53.0-beta.1)

src/sync/base_cache.rs

@@ -568,13 +568,9 @@ where
  // The entry has been already admitted, so treat this as an update.
  deqs.move_to_back_ao(&entry);
  deqs.move_to_back_wo(&entry);
- done = true;
- break;
  } else if self.cache.len() <= self.max_capacity {
  // There are some room in the cache. Add the candidate to the deques.
  self.handle_admit(kh.clone(), &entry, last_accessed, last_modified, deqs);
- done = true;
- break;
  } else {
  let victim = match Self::find_cache_victim(deqs, freq) {
  // Found a victim.
@@ -620,9 +616,9 @@ where
  // The candidate is not admitted. Remove it from the cache (hash map).
  self.cache.remove(&Arc::clone(&kh.key));
  }
- done = true;
- break;
  }
+ done = true;
+ break;
  }
 
  if !done {