remove Dockerfile.wrapper (#1429)

Remove Dockerfile.wrapper, it's not used anymore and no test cover this Dockerfile. So remove this Dockerfile to avoid regression.

Signed-off-by: chensuyue <suyue.chen@intel.com>

ChatQnA/docker_image_build/build.yaml

@@ -11,12 +11,6 @@ services:
       context: ../
       dockerfile: ./Dockerfile
     image: ${REGISTRY:-opea}/chatqna:${TAG:-latest}
-  chatqna-wrapper:
-    build:
-      context: ../
-      dockerfile: ./Dockerfile.wrapper
-    extends: chatqna
-    image: ${REGISTRY:-opea}/chatqna-wrapper:${TAG:-latest}
   chatqna-guardrails:
     build:
       context: ../