error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
  --> $DIR/issue_4266.rs:4:1
   |
LL | async fn sink1<'a>(_: &'a str) {} // lint
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::needless-lifetimes` implied by `-D warnings`

error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
  --> $DIR/issue_4266.rs:8:1
   |
LL | / async fn one_to_one<'a>(s: &'a str) -> &'a str {
LL | |     s
LL | | }
   | |_^

error: aborting due to 2 previous errors