knot: remove unused includes

src/knot/nameserver/internet.h

@@ -28,7 +28,6 @@
 
 #include "libknot/packet/pkt.h"
 #include "libknot/processing/layer.h"
-#include "knot/zone/contents.h"
 
 /* Query data (from query processing). */
 struct query_data;

src/knot/server/udp-handler.c

@@ -22,7 +22,6 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <poll.h>
 #include <sys/syscall.h>
 #include <string.h>
 #include <assert.h>