Removed unnecessary libxml2 import

(cherry picked from commit 510f7cc15b9b2e10c000806c6139cb7cf3eb1c03)
Signed-off-by: Martin Bobak <mbobak@cisco.com>
Signed-off-by: Michal Rehak <mirehak@cisco.com>
Change-Id: Id60806ef8816b333bd4136f176d99e4d20291b12