win: Move autodel to C only

Note: this is C only, not legacy only.
The problem is that bindings will hold a strong reference to the window,
which will then die "under the rug" if autodel is enabled. This then
leads to at least ERR if not crashes.

Note:
elm_policy needs to support autodel and quit on last del only for C
applications. Bindings will require some other mechanism that doesn't
break all assumptions wrt. references.

unsorted/elementary/toolbar_cxx_example_01.cc

@@ -25,8 +25,6 @@ elm_main(int argc, char* argv[])
         win_1.type_set(EFL_UI_WIN_BASIC);
       });
 
-   win_1.autodel_set(true);
-
 #if 0
    win_1.eo_cxx::efl::Gfx::size_set({320, 300});