tnccs-11: Remove legacy TNCCS-1.1 implementation

There is no reason to keep this around anymore (has been superseded by
TNCCS-2.0 a long time ago).  Removed the corresponding test scenarios.

Since this is the last user of libxml, also removed those references.

testing/scripts/build-baseimage

@@ -14,7 +14,7 @@ check_commands debootstrap mkfs.ext3 blockdev qemu-img qemu-nbd sfdisk
 # package includes/excludes
 INC=automake,autoconf,libtool,bison,flex,gperf,pkg-config,less,locales
 INC=$INC,build-essential,libgmp-dev,libldap2-dev,libcurl4-openssl-dev,ethtool
-INC=$INC,libxml2-dev,libtspi-dev,libsqlite3-dev,openssh-server,tcpdump,psmisc
+INC=$INC,libtspi-dev,libsqlite3-dev,openssh-server,tcpdump,psmisc
 INC=$INC,openssl,vim,sqlite3,conntrack,gdb,cmake,libltdl-dev,wget,gnupg,man-db
 INC=$INC,libboost-thread-dev,libboost-system-dev,git,iperf3,htop,valgrind,strace
 INC=$INC,gnat,gprbuild,acpid,acpi-support-base,libldns-dev,libunbound-dev

testing/scripts/recipes/013_strongswan.mk

@@ -42,7 +42,6 @@ CONFIG_OPTS = \
 	--enable-tnc-pdp \
 	--enable-tnc-imc \
 	--enable-tnc-imv \
-	--enable-tnccs-11 \
 	--enable-tnccs-20 \
 	--enable-tnccs-dynamic \
 	--enable-imc-test \