evas object: Hide "del" event

In EO world, we should stick to EO_EVENT_DEL.

src/lib/elementary/elm_widget.c

@@ -6,6 +6,8 @@
 #define ELM_INTERFACE_ATSPI_COMPONENT_PROTECTED
 #define ELM_WIDGET_PROTECTED
 #define ELM_WIDGET_ITEM_PROTECTED
+#define EFL_CANVAS_OBJECT_BETA
+
 #include <Elementary.h>
 
 #include "elm_priv.h"

src/lib/evas/canvas/efl_canvas_object.eo

@@ -724,7 +724,7 @@ abstract Efl.Canvas.Object (Eo.Base, Efl.Gfx, Efl.Gfx.Stack, Efl.Animator,
        key,up @beta; [[Key Release Event ]]
        focus,in; [[Focus In Event ]]
        focus,out; [[Focus Out Event ]]
-       del; [[Object Being Deleted (called before Free) ]]
+       del @beta; [[Object Being Deleted (called before Free) ]]
        hold; [[Events go on/off hold ]]
    }
 }

src/lib/evas/canvas/evas_object_table.c

@@ -1,3 +1,5 @@
+#define EFL_CANVAS_OBJECT_BETA
+
 #include "evas_common_private.h"
 #include "evas_private.h"
 #include <errno.h>

src/lib/evas/canvas/evas_object_textblock.c

@@ -61,6 +61,9 @@
  * @subsection textblock_layout The layout system
  * @todo write @ref textblock_layout
  */
+
+#define EFL_CANVAS_OBJECT_BETA
+
 #include "evas_common_private.h"
 #include "evas_private.h"