refactor: rm unnecessary constraint

Author: Thaumy

src/infra/vec.rs

@@ -2,10 +2,7 @@ pub trait VecExt<T> {
     fn chain_push(self, item: T) -> Vec<T>;
 }
 
-impl<T> VecExt<T> for Vec<T>
-where
-    T: Clone,
-{
+impl<T> VecExt<T> for Vec<T> {
     #[inline]
     fn chain_push(mut self, item: T) -> Self {
         self.push(item);