CLEANUP: lua: Remove declaration of an inexistant function

action_http_after_res_custom() is declared but never defined. The declaration
was introduced by the commit 86f8f6f78 ("MINOR: actions: Export actions lookup
functions"). But the definition does not exist because the HTTP after-response
ruleset only exist since the 2.2.

This patch must be backported where the above patch is, as far as 1.8. There is
no upstream commit ID for this patch.

(cherry picked from commit 0fcb0af05ccfd2894ca31257c6a80d91198a9aec)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed