prod_image_util.sh: Temporarily nobble removing unsigned kernel and GRUB

We would normally remove these for an official build so that the signed
versions can be uploaded later. However, we are not doing that signing
until we pass the shim review.

Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>

Author: chewi

build_library/prod_image_util.sh

@@ -182,6 +182,8 @@ EOF
 
   # Official builds will sign and upload these files later, so remove them to
   # prevent them from being uploaded now.
+  # TODO: Un-nobble this later when we have passed the shim review.
+  false && \
   if [[ ${COREOS_OFFICIAL:-0} -eq 1 ]]; then
     rm -v \
         "${BUILD_DIR}/${image_kernel}" \