Merge pull request #1799 from keshavprasadms/release-3.0.0

fix: this reverts the kid exists check

images/kong/plugins/0.14.1/jwt/handler.lua

@@ -140,14 +140,6 @@ local function do_authentication(conf)
     return responses.send_HTTP_INTERNAL_SERVER_ERROR(err)
   end
 
-  if not jwt_secret then
-   -- Restore the key if kid not found and fetch from db
-    jwt_secret_key = claims[conf.key_claim_name] or header[conf.key_claim_name]
-    jwt_secret_cache_key = singletons.dao.jwt_secrets:cache_key(jwt_secret_key)
-    jwt_secret, err      = singletons.cache:get(jwt_secret_cache_key, nil,
-                                                     load_credential, jwt_secret_key)
-   end
-
   if not jwt_secret then
     return false, {status = 403, message = "No credentials found for given '" .. conf.key_claim_name .. "'"}
   end