Remove unnecessary backslash

.gitlab-ci.yml

@@ -445,7 +445,7 @@ cleanup_knightly:
   script:
     - >
       SERVER_TO_BE_DELETE=($(openstack server list --name $OOD_INSTANCE_NAME --sort-column Image --sort-descending -f value -c ID
-      | awk -v NSTK=$NUM_SERVER_TO_KEEP -v OID=$OLD_INSTANCE_ID '$0 != OID {count++} \
+      | awk -v NSTK=$NUM_SERVER_TO_KEEP -v OID=$OLD_INSTANCE_ID '$0 != OID {count++}
       $0 != OID && count>NSTK {print}'))
     - |
       for svr in ${SERVER_TO_BE_DELETE[@]}; do