Remove an inaccurate comment about STLDeleteElements.
Remove an inaccurate comment about STLDeleteElements.

STLDeleteElements function is already in base/stl_util-inl.h

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/2752001

git-svn-id: http://src.chromium.org/svn/trunk/src@49140 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 15eb39155e4e3bf517069eef31a619848a826e28
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser