delete mistaken sleep in the previous commit

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 d5b2b4e..a246924 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -1362,7 +1362,5 @@
         }
     }
 
-sleep(50);
-
     exit(0);
 }