ecore-evas-wayland: remove duplicated shutdown of ecore_evas_wl_common

Summary:
 After a creation for ecore_evas_wayland_shm or ecore_evas_wayland_egl is
failed, _ecore_evas_wl_common_shutdown() gets called 'twice'.

 First shutdown is from _ecore_evas_wl_common_free() which is set as fn_free()
of ecore_evas engine, and this fn_free() is called by ecore_evas_free().
 Second is from direct call inside ecore_evas_wayland_shm_new_internal()
(or ecore_evas_wayland_egl_new_internal()).
 This duplicated shutdown causes block of first next _ecore_evas_wl_common_init
because init count is not zero but -1.

 So second shutdown should be removed so that it makes enable fall back to
another wayland engine correctly when one is failed to create ecore_evas_wayland.

@fix

Reviewers: gwanglim, devilhorns

Reviewed By: devilhorns

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D2451

src/modules/ecore_evas/engines/wayland/ecore_evas_wayland_egl.c

@@ -253,7 +253,6 @@ ecore_evas_wayland_egl_new_internal(const char *disp_name, unsigned int parent,
 
  err:
    ecore_evas_free(ee);
-   _ecore_evas_wl_common_shutdown();
 
  ee_err:
    ecore_wl_shutdown();

src/modules/ecore_evas/engines/wayland/ecore_evas_wayland_shm.c

@@ -247,7 +247,6 @@ ecore_evas_wayland_shm_new_internal(const char *disp_name, unsigned int parent,
 
  err:
    ecore_evas_free(ee);
-   _ecore_evas_wl_common_shutdown();
  ee_err:
    ecore_wl_shutdown();
    return NULL;