Layouting: Remove some now unused functions

Change-Id: I9e91bdbf68c38da22bd2378cb7d9596306bbb413
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/layoutbuilder.cpp

@@ -239,9 +239,6 @@ public:
 
     void addItem(const LayoutItem &item);
     void addItems(const LayoutItems &items);
-    void addRow(const LayoutItems &items);
-
-    bool isForm() const;
 
     QList<Slice> stack;
 };
@@ -324,7 +321,7 @@ void doAddWidget(LayoutBuilder &builder, QWidget *widget)
 
     A LayoutBuilder instance is typically used locally within a function and never stored.
 
-    \sa addItem(), addItems(), addRow()
+    \sa addItem(), addItems()
 */
 
 
@@ -346,12 +343,6 @@ void LayoutBuilder::addItems(const LayoutItems &items)
         addItemHelper(*this, item);
 }
 
-void LayoutBuilder::addRow(const LayoutItems &items)
-{
-    addItem(br);
-    addItems(items);
-}
-
 /*!
     This starts a new row containing \a items. The row can be further extended by
     other items using \c addItem() or \c addItems().
@@ -401,11 +392,6 @@ QWidget *LayoutItem::emerge()
     return w;
 }
 
-bool LayoutBuilder::isForm() const
-{
-    return qobject_cast<QFormLayout *>(stack.last().layout);
-}
-
 static void layoutExit(LayoutBuilder &builder)
 {
     builder.stack.last().flush();