message: remove unused lifetime from forward_val_assign
diff: @@ -107,7 +107,7 @@ macro_rules! forward_ref_ref_binop_commutative {
  macro_rules! forward_val_assign {
  (impl $imp:ident for $res:ty, $method:ident) => {
  - impl<'a> $imp<$res> for $res {
  + impl $imp<$res> for $res {
  #[inline]
  fn $method(&mut self, other: $res) {
  self.$method(&other);
  @@ -117,7 +117,7 @@ macro_rules! forward_val_assign {
  }
  macro_rules! forward_val_assign_scalar {
  (impl $imp:ident for $res:ty, $scalar:ty, $method:ident) => {
  - impl<'a> $imp<$res> for $scalar {
  + impl $imp<$res> for $scalar {
  #[inline]
  fn $method(&mut self, other: $res) {
  self.$method(&other);
  