A function with void return type doesn't need @retval line in its function
comment. This patch removes one redundant line from Ip6 driver in r18365.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18384 6f19259b-4bc3-4df7-8a09-765794883524