chrony: remove old files

Remove files that were accidentally included in the previous merge
(pull request #1802). The obsolete patches are breaking the build now.

Signed-off-by: Miroslav Lichvar <mlichvar0@gmail.com>

net/chrony/patches/001-crosscompile.patch

@@ -1,25 +0,0 @@
---- a/configure
-+++ b/configure
-@@ -254,6 +254,13 @@ do
-     --host-machine=* )
-       MACHINE=`echo $option | sed -e 's/^.*=//;'`
-     ;;
-+    --target=* )
-+      TARGET=`echo $option | sed -e 's/[^=]*=//;'`
-+      OPERATINGSYSTEM=`echo $TARGET | sed -e 's/.*-//;'`
-+      MACHINE=`echo $TARGET | sed -e 's/-.*//;'`
-+      VERSION=""
-+      SYSTEM=${OPERATINGSYSTEM}-${MACHINE}
-+    ;;
-     --help | -h )
-       usage
-       exit 0
-@@ -287,7 +294,7 @@ case $SYSTEM in
-         ;;
-     esac
-     ;;
--    Linux* )
-+    Linux* | linux* )
-         EXTRA_OBJECTS="sys_linux.o wrap_adjtimex.o"
-         try_linuxcaps=1
-         try_rtc=1

net/chrony/patches/002-ipv6_disabled_fixes.patch

@@ -1,34 +0,0 @@
---- a/ntp_io.c
-+++ b/ntp_io.c
-@@ -355,6 +355,7 @@ read_from_socket(void *anything)
-       }
- #endif
- 
-+#ifdef HAVE_IPV6
- #ifdef IPV6_PKTINFO
-       if (cmsg->cmsg_level == IPPROTO_IPV6 && cmsg->cmsg_type == IPV6_PKTINFO) {
-         struct in6_pktinfo ipi;
-@@ -365,6 +366,7 @@ read_from_socket(void *anything)
-         remote_addr.local_ip_addr.family = IPADDR_INET6;
-       }
- #endif
-+#endif
- 
- #ifdef SO_TIMESTAMP
-       if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SO_TIMESTAMP) {
-@@ -466,6 +468,7 @@ send_packet(void *packet, int packetlen,
-   }
- #endif
- 
-+#ifdef HAVE_IPV6
- #ifdef IPV6_PKTINFO
-   if (remote_addr->local_ip_addr.family == IPADDR_INET6) {
-     struct cmsghdr *cmsg;
-@@ -484,6 +487,7 @@ send_packet(void *packet, int packetlen,
-         sizeof(ipi->ipi6_addr.s6_addr));
-   }
- #endif
-+#endif
- 
- #if 0
-     LOG(LOGS_INFO, LOGF_NtpIO, "sending to %s:%d from %s",