Remove KID in Reference CDDL on the EAT Profile. Address issue #91 (#92)

Signed-off-by: Fabrizio Damato <fabrizio.damato@amd.com>

Author: fdamato

specifications/ietf-eat-profile/cddl/ietf_eat_ocp_profile.cddl

@@ -79,7 +79,6 @@ protected-ce-header-map = {
   ; Well-defined header fields
   &(alg-id: 1) => int
   &(content-type: 3) => tstr / int
-  &(issuer-key-id: 4) => bstr
   ; User-defined fields
   * cose-label => cose-value
 }