Remove unnecessary generic type arguments

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175155365

java/google/registry/model/poll/PollMessage.java

@@ -221,8 +221,9 @@ public abstract class PollMessage extends ImmutableObject
 
     @Override
     public ImmutableList<ResponseExtension> getResponseExtensions() {
-      return (launchInfoResponseExtension == null) ? ImmutableList.<ResponseExtension>of() :
-          ImmutableList.<ResponseExtension>of(launchInfoResponseExtension);
+      return (launchInfoResponseExtension == null)
+          ? ImmutableList.of()
+          : ImmutableList.of(launchInfoResponseExtension);
     }
 
     /** A builder for {@link OneTime} since it is immutable. */
@@ -313,7 +314,7 @@ public abstract class PollMessage extends ImmutableObject
     public ImmutableList<ResponseData> getResponseData() {
       // Note that the event time is when the auto-renew occured, so the expiration time in the
       // response should be 1 year past that, since it denotes the new expiration time.
-      return ImmutableList.<ResponseData>of(
+      return ImmutableList.of(
           DomainRenewData.create(getTargetId(), getEventTime().plusYears(1)));
     }
 

java/google/registry/model/poll/PollMessageExternalKeyConverter.java

@@ -51,7 +51,7 @@ public class PollMessageExternalKeyConverter extends Converter<Key<PollMessage>,
    * belongs to.
    */
   public static final ImmutableBiMap<Class<? extends EppResource>, Long> EXTERNAL_KEY_CLASS_ID_MAP =
-      ImmutableBiMap.<Class<? extends EppResource>, Long>of(
+      ImmutableBiMap.of(
           DomainBase.class, 1L,
           ContactResource.class, 2L,
           HostResource.class, 3L);