SceneGraph: removed long-deprecated feature and child accessors.

Use methods on linked list returned by AbstractObject::features() and
Object::children() instead.

src/Magnum/SceneGraph/AbstractObject.h

@@ -37,10 +37,6 @@
 #include "Magnum/SceneGraph/SceneGraph.h"
 #include "Magnum/SceneGraph/visibility.h"
 
-#ifdef MAGNUM_BUILD_DEPRECATED
-#include <Corrade/Utility/Macros.h>
-#endif
-
 namespace Magnum { namespace SceneGraph {
 
 /**
@@ -118,36 +114,6 @@ template<UnsignedInt dimensions, class T> class AbstractObject
             return static_cast<const Containers::LinkedList<AbstractFeature<dimensions, T>>&>(*this);
         }
 
-        #ifdef MAGNUM_BUILD_DEPRECATED
-        /**
-         * @brief Whether this object has features
-         * @deprecated Use `features().isEmpty()` instead.
-         */
-        CORRADE_DEPRECATED("use features().isEmpty() instead") bool hasFeatures() const { return !features().isEmpty(); }
-
-        /**
-         * @brief First object feature or `nullptr`, if this object has no features
-         * @deprecated Use `features().first()` instead.
-         */
-        CORRADE_DEPRECATED("use features().first() instead") FeatureType* firstFeature() { return features().first(); }
-
-        /** @overload
-         * @deprecated Use `features().first()` instead.
-         */
-        CORRADE_DEPRECATED("use features().first() instead") const FeatureType* firstFeature() const { return features().first(); }
-
-        /**
-         * @brief Last object feature or `nullptr`, if this object has no features
-         * @deprecated Use `features().last()` instead.`
-         */
-        CORRADE_DEPRECATED("use features().last() instead") FeatureType* lastFeature() { return features().last(); }
-
-        /** @overload
-         * @deprecated Use `features().last()` instead.
-         */
-        CORRADE_DEPRECATED("use features().last() instead") const FeatureType* lastFeature() const { return features().last(); }
-        #endif
-
         /**
          * @brief Add a feature
          *

src/Magnum/SceneGraph/Object.h

@@ -197,36 +197,6 @@ template<class Transformation> class Object: public AbstractObject<Transformatio
             return static_cast<const Containers::LinkedList<Object<Transformation>>&>(*this);
         }
 
-        #ifdef MAGNUM_BUILD_DEPRECATED
-        /**
-         * @brief Whether this object has children
-         * @deprecated Use `children().isEmpty()` instead.
-         */
-        CORRADE_DEPRECATED("use children().isEmpty()") bool hasChildren() const { return !children().isEmpty(); }
-
-        /**
-         * @brief First child object or `nullptr`, if this object has no children
-         * @deprecated Use `children().first()` instead.
-         */
-        CORRADE_DEPRECATED("use children().first()") Object<Transformation>* firstChild() { return children().first(); }
-
-        /** @overload
-         * @deprecated Use `children.first()` instead.
-         */
-        CORRADE_DEPRECATED("use children().first()") const Object<Transformation>* firstChild() const { return children().first(); }
-
-        /**
-         * @brief Last child object or `nullptr`, if this object has no children
-         * @deprecated Use `children().last()` instead.
-         */
-        CORRADE_DEPRECATED("use children().last()") Object<Transformation>* lastChild() { return children().last(); }
-
-        /** @overload
-         * @deprecated Use `children().last()` instead.
-         */
-        CORRADE_DEPRECATED("use children().last()") const Object<Transformation>* lastChild() const { return children().last(); }
-        #endif
-
         /**
          * @brief Add a child
          *