SEBA-457 Remove files obsoleted by core model cleanup

Change-Id: I1c6fd7277467005e399074b30d759a0bfd5bcc68
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index ee2ddbe..059ef0a 100644
--- a/containers/chameleon/Dockerfile.chameleon
+++ b/containers/chameleon/Dockerfile.chameleon
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/chameleon
-FROM xosproject/xos-base:2.2.6
+FROM xosproject/xos-base:2.2.7
 
 # xos-base already has protoc and dependencies installed