Revert "change ImageServingHelper::onLinksUpdateComplete to use the image list as provided by LinksUpdate, rather than building up the list of images itself."

This reverts commit 703b0d3ec65e784131380fcb474066bc7aa0e1f5.

(cherry picked from commit 53bb4295682e0f6bca654961fa8478bfed022606)
removing unused call

(cherry picked from commit b6b93b38b74a94bfb6ecd0d58d51b03f24fddfc6)