Excavator: Remove calls to deprecated APIs

Author: svc-excavator-bot

extras/jackson-support/src/main/java/com/palantir/conjure/java/api/ext/jackson/ObjectMappers.java

@@ -96,7 +96,6 @@ public static ObjectMapper newCborServerObjectMapper() {
      *   <li>Deserializing a null for a primitive field will throw an exception.
      * </ul>
      */
-    @SuppressWarnings("for-rollout:deprecation")
     public static ObjectMapper withDefaultModules(ObjectMapper mapper) {
         return mapper.registerModule(new GuavaModule())
                 .registerModule(new ShimJdk7Module())