Correct report_elidable_impl_lifetimes following rust-lang#13752

Author: smoelius

clippy_lints/src/lifetimes.rs

@@ -643,8 +643,7 @@ fn report_extra_impl_lifetimes<'tcx>(cx: &LateContext<'tcx>, impl_: &'tcx Impl<'
 
 // An `impl` lifetime is elidable if it satisfies the following conditions:
 // - It is used exactly once.
-// - That single use is not in a bounded type or `GenericArgs` in a `WherePredicate`. (Note that
-//   `GenericArgs` are different from `GenericParam`s.)
+// - That single use is not in a `WherePredicate`.
 fn report_elidable_impl_lifetimes<'tcx>(
     cx: &LateContext<'tcx>,
     impl_: &'tcx Impl<'_>,