eo: unref compensate is not requires here

this check caused a leaked reference.

Eo objects are having two reference counters a internal and external
one. The external one can be manipulated via efl_ref / efl_unref. The
internal one can be manipulated via _efl_ref _efl_unref.

The external reference counter is keeping a internal reference by the
time the external counter is > 0. When the external counter reaches ==
0 this internal reference is given up with the _efl_unref call in
eo.c:1928.

However, checking unref_compensate in the block in line 1950 leads that
to the leak that this internal reference is not given up at the pointer
user_refcount reaches exactly 0. This check also does not prevent
anything, the object is kept alive anywayys as the efl_unref method
keeps its private internal reference.

This lead to leaks in efl_device_* classes, parts have not been
destructed correctly.

Differential Revision: https://phab.enlightenment.org/D6252

src/lib/eo/eo.c

@@ -1912,7 +1912,7 @@ efl_unref(const Eo *obj_id)
 #ifdef EO_DEBUG
    _eo_log_obj_ref_op(obj, EO_REF_OP_UNREF);
 #endif
-   if (EINA_UNLIKELY((obj->user_refcount <= 0 && !obj->unref_compensate)))
+   if (EINA_UNLIKELY((obj->user_refcount <= 0)))
      {
         if (obj->user_refcount < 0)
           {