Remove fprintf causing log spam

Since #521, prepare_pkts may be called
on every call, not just on startup. This means that the log it prints to
stderr is very visible and may cause performance problems. This commit
removes it.

CHANGES.md

@@ -1,3 +1,8 @@
+Bugs fixed in 3.7.2
+===================
+
+- Remove excessive log
+
 Bugs fixed in 3.7.1
 =======================
 

src/prepare_pcap.c

@@ -282,7 +282,6 @@ int prepare_pkts(const char* file, pcap_pkts* pkts)
     pkts->max = pkts->pkts + n_pkts;
     pkts->max_length = max_length;
     pkts->base = base;
-    fprintf(stderr, "In pcap %s, npkts %d\nmax pkt length %lu\nbase port %d\n", file, n_pkts, max_length, base);
     pcap_close(pcap);
 
     return 0;