Remove LIFETIME_BOUND on function that returns void.

Upcoming clange change (llvm/llvm-project#114203) makes clang to emit an error when [[lifetimebound]] attribute is applied on a function implicit object parameter while the function returns void.

This instance found by https://source.chromium.org/search?q=(void%5C%20.*LIFETIME_BOUND).

Bug: 378948410
Change-Id: Id6823fb5950f8bedff90a0ddc63ed9fe7bfa9a99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6021322
Commit-Queue: Nico Weber <[email protected]>
Auto-Submit: Zequan Wu <[email protected]>
Reviewed-by: Nico Weber <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1382755}
NOKEYCHECK=True
GitOrigin-RevId: 0dd182c28caed0ce8eee36c25c1ef3d85dc592d0

Author: ZequanWu

types/zip.h

@@ -73,7 +73,7 @@ class Zipper {
     }
 
     template <std::size_t... Is>
-    constexpr void advance(std::index_sequence<Is...>) LIFETIME_BOUND {
+    constexpr void advance(std::index_sequence<Is...>) {
       CHECK(operator!=(ZipEnd()));
       // SAFETY: The increment is safe as it has been just CHECKed so it is
       // guaranteed to be inside [begin_, end_).