Revert "MB-10953 Clear ssl PEM cache after saving certificates."

This reverts commit ad9ff254ce8414aeba55fceca1c472da9cff9412.

Because ssl_manager:clear_pem_cache is not available in r14b04.

Change-Id: I31f47be97a7d6acf53df87bfb548cf5a5b4b897e
Reviewed-on: http://review.couchbase.org/36726
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>