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.

docs/user/interface/AbstractLayout.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\class BAbstractLayout
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief BLayout subclass providing convenience methods for derived

docs/user/interface/GridLayout.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file GridLayout.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Provides the BGridLayout class.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BGridLayout
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief The BGridLayout class a BLayout subclass that arranges the items it

docs/user/interface/GroupLayout.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file GroupLayout.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Describes the BGroupLayout class.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BGroupLayout
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief The BGroupLayout class is a simple BLayout subclass that

docs/user/interface/Layout.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file Layout.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Defines the BLayout class.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BLayout
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief The BLayout class provides an interface, and some basic

docs/user/interface/LayoutBuilder.Group.dox

@@ -14,7 +14,6 @@
 
 /*!
 	\file GroupLayoutBuilder.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Provides the BLayoutBuilder::Group<> class.
@@ -25,7 +24,6 @@
 
 /*!
 	\class BLayoutBuilder::Group<>
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief BLayoutBuilder::Base subclass for building BGroupLayouts.

docs/user/interface/LayoutBuilder.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file LayoutBuilder.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Defines the BLayoutBuilder templates.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BLayoutBuilder::Base<>
-	\ingroup interface
 	\ingroup layout
 	\brief Base for all other layout builders in the BLayoutBuilder namespace.
 

docs/user/interface/LayoutItem.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file LayoutItem.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Describes the BLayoutItem class.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BLayoutItem
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Abstract class representing things that are positionable and

docs/user/interface/TwoDimensionalLayout.dox

@@ -13,7 +13,6 @@
 
 /*!
 	\file TwoDimensionalLayout.h
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Defines the BTwoDimensionalLayout class.
@@ -22,7 +21,6 @@
 
 /*!
 	\class BTwoDimensionalLayout
-	\ingroup interface
 	\ingroup layout
 	\ingroup libbe
 	\brief Abstract BLayout subclass arranging items within rows and columns.