cla-sysrepo: remove unused variable from czechlight-install-yang.sh

Change-Id: I123e6a68318e652f802b5f4e40d1bdcb8211362f
diff --git a/package/cla-sysrepo/czechlight-install-yang.sh b/package/cla-sysrepo/czechlight-install-yang.sh
index 72b3f33..d8a11ed 100755
--- a/package/cla-sysrepo/czechlight-install-yang.sh
+++ b/package/cla-sysrepo/czechlight-install-yang.sh
@@ -9,7 +9,6 @@
 
 CLA_YANG=/usr/share/cla-sysrepo/yang
 VELIA_YANG=/usr/share/velia/yang
-REPO=/etc/sysrepo/yang
 
 for ARG in $(cat /proc/cmdline); do
     case "${ARG}" in