history: Remove unused bookmark constant.

BUG=None
TEST=None

R=sky@chromium.org

Review URL: http://codereview.chromium.org/7316009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91718 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/history/in_memory_history_backend.cc

@@ -22,10 +22,6 @@
 
 namespace history {
 
-// If a page becomes starred we use this id in place of the real starred id.
-// See note in OnURLsStarred.
-static const StarID kBogusStarredID = 0x0FFFFFFF;
-
 InMemoryHistoryBackend::InMemoryHistoryBackend()
     : profile_(NULL) {
 }