Augustin Cavalier 9dc2625de0 docs/user: Remove duplicate "ingroup interface" from layout docs.
Since the "Layout" group is a member of the "Interface" group,
Doxygen automatically adds the "Interface" group to all pages
in the "Layout" group, meaning that having an explicit "ingroup Interface"
created duplicate group tags.
2017-01-28 13:22:53 -05:00
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