[Most Visited] Removes obsolete TODO

Bug: 862753
Change-Id: Ia78ef91e67e9ffec0b601c78967586a0d54a9666
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2295299
Auto-Submit: Ramya Nagarajan <ramyan@chromium.org>
Commit-Queue: Ramya Nagarajan <ramyan@chromium.org>
Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#787774}

components/ntp_tiles/most_visited_sites.h

@@ -106,7 +106,6 @@ class MostVisitedSites : public history::TopSitesObserver,
     virtual ~HomepageClient() = default;
     virtual bool IsHomepageTileEnabled() const = 0;
     virtual GURL GetHomepageUrl() const = 0;
-    // TODO(https://crbug.com/862753): Extract this to another interface.
     virtual void QueryHomepageTitle(TitleCallback title_callback) = 0;
   };