Evas.Image: Simplify inheritance tree of image classes

This is a bit artificial, as all image objects are still based on
the Evas.Image main class. The inheritance tree alone does not
give much information on what features are supported by which
class (eg. only Efl.Canvas.Image supports the file interface for
file_set).

src/lib/evas/canvas/efl_canvas_proxy.eo

@@ -1,4 +1,4 @@
-class Efl.Canvas.Proxy (Evas.Image, Efl.Gfx.Base, Efl.Image, Efl.Gfx.Buffer, Efl.Gfx.Fill, Efl.Gfx.View, Efl.Gfx.Filter)
+class Efl.Canvas.Proxy (Evas.Image)
 {
    [[Low-level proxy image object.
 

src/lib/evas/canvas/efl_canvas_scene3d.eo

@@ -1,4 +1,4 @@
-class Efl.Canvas.Scene3d (Evas.Image, Efl.Gfx.Base, Efl.Image, Efl.Gfx.Buffer, Efl.Gfx.Fill, Efl.Gfx.View, Efl.Gfx.Filter)
+class Efl.Canvas.Scene3d (Evas.Image)
 {
    [[A UI view for EFL Canvas 3D.]]
    legacy_prefix: null;

src/lib/evas/canvas/efl_canvas_snapshot.eo

@@ -1,4 +1,4 @@
-class Efl.Canvas.Snapshot (Evas.Image, Efl.Gfx.Base, Efl.Image, Efl.Gfx.Buffer, Efl.Gfx.Fill, Efl.Gfx.View, Efl.Gfx.Filter)
+class Efl.Canvas.Snapshot (Evas.Image)
 {
    [[Low-level snapshot image object.
 

src/lib/evas/canvas/efl_canvas_surface.eo

@@ -1,4 +1,4 @@
-mixin Efl.Canvas.Surface (Evas.Image, Efl.Gfx.Buffer, Efl.Gfx.View)
+mixin Efl.Canvas.Surface (Evas.Image)
 {
    [[Native surfaces usually bound to an externally-managed buffer.
 

src/lib/evas/canvas/evas_image.eo

@@ -1,8 +1,7 @@
 type @extern Evas_Object_Image_Pixels_Get_Cb: __undefined_type; /* FIXME: func pointers are not supported. */
 
-class Evas.Image (Evas.Object, Efl.File, Efl.Image, Efl.Image_Load,
-                  Efl.Image_Animated, Efl.Gfx.Buffer, Efl.Gfx.Fill,
-                  Efl.Gfx.View, Evas.Filter)
+class Evas.Image (Evas.Object, Evas.Filter,
+                  Efl.Image, Efl.Gfx.Buffer, Efl.Gfx.Fill, Efl.Gfx.View, Efl.File)
 {
    /* Legacy is implement inside Efl.Canvas.Image */
    legacy_prefix: evas_object_image;