Removed the "worker_rlimit_sigpending" directive.

It was only needed by the just removed rtsig module.

src/core/nginx.c

diff --git a/src/core/nginx.c b/src/core/nginx.c
index 90c60fd..231a3da 100644
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -118,13 +118,6 @@
       offsetof(ngx_core_conf_t, rlimit_core),
       NULL },
 
-    { ngx_string("worker_rlimit_sigpending"),
-      NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
-      ngx_conf_set_num_slot,
-      0,
-      offsetof(ngx_core_conf_t, rlimit_sigpending),
-      NULL },
-
     { ngx_string("working_directory"),
       NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
       ngx_conf_set_str_slot,
@@ -948,7 +941,6 @@
 
     ccf->rlimit_nofile = NGX_CONF_UNSET;
     ccf->rlimit_core = NGX_CONF_UNSET;
-    ccf->rlimit_sigpending = NGX_CONF_UNSET;
 
     ccf->user = (ngx_uid_t) NGX_CONF_UNSET_UINT;
     ccf->group = (ngx_gid_t) NGX_CONF_UNSET_UINT;

src/core/ngx_cycle.h

diff --git a/src/core/ngx_cycle.h b/src/core/ngx_cycle.h
index 0665bd0..c601ea1 100644
--- a/src/core/ngx_cycle.h
+++ b/src/core/ngx_cycle.h
@@ -83,7 +83,6 @@
      ngx_int_t                debug_points;
 
      ngx_int_t                rlimit_nofile;
-     ngx_int_t                rlimit_sigpending;
      off_t                    rlimit_core;
 
      int                      priority;

src/os/unix/ngx_process_cycle.c

diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 1d5e700..5067632 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -840,19 +840,6 @@
         }
     }
 
-#ifdef RLIMIT_SIGPENDING
-    if (ccf->rlimit_sigpending != NGX_CONF_UNSET) {
-        rlmt.rlim_cur = (rlim_t) ccf->rlimit_sigpending;
-        rlmt.rlim_max = (rlim_t) ccf->rlimit_sigpending;
-
-        if (setrlimit(RLIMIT_SIGPENDING, &rlmt) == -1) {
-            ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                          "setrlimit(RLIMIT_SIGPENDING, %i) failed",
-                          ccf->rlimit_sigpending);
-        }
-    }
-#endif
-
     if (geteuid() == 0) {
         if (setgid(ccf->group) == -1) {
             ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,