packaging: remove headers_check in spec file

packaging: remove headers_check in spec file

Remove headers_check in spec file.
When build the current version, WARNING message is displayed.

[   64s] =================== WARNING ===================
[   64s] Since Linux 5.5, 'make headers_check' is no-op,
[   64s] and will be removed after Linux 5.15 release.
[   64s] Please remove headers_check from your scripts.
[   64s] ===============================================

Change-Id: I62aebbe5dae0d5909eefb518ff26dd99ce91ee3e
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>