dead code und unbenutzte Variablen entfernt

Change-Id: I18b5d6a8cdf221d3a376541c01e82a1c64f10508
diff --git a/secure/udp_mail.c b/secure/udp_mail.c
index 4bd8d74..2f13f1d 100644
--- a/secure/udp_mail.c
+++ b/secure/udp_mail.c
@@ -59,9 +59,7 @@
 
 static void remove_from_spool(string spool_file)
 {
-  int idx;
-
-  if(spool && (idx=member(spool,spool_file))!=-1)
+  if(spool && (member(spool,spool_file))!=-1)
     {
       spool -= ({ spool_file });
       if(!sizeof(spool))