Remove web & protocol WHOIS, check API, and RDAP from frontend

These are now handled by the pubapi service and all publicly facing sites that
were using these APIs have already been migrated over.

For documentation on the newly added dispatch.xml file, see:
https://cloud.google.com/appengine/docs/standard/java/config/dispatchref

Note that the --auto_update_dispatch parameter needs to be passed to the
`appcfg update` command in order to apply this new XML file.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=200441580

java/google/registry/module/pubapi/PubApiComponent.java

@@ -47,7 +47,6 @@ import javax.inject.Singleton;
     ConfigModule.class,
     CustomLogicFactoryModule.class,
     google.registry.keyring.api.DummyKeyringModule.class,
-    PubApiMetricsModule.class,
     PubApiRequestComponentModule.class,
     GoogleCredentialModule.class,
     Jackson2Module.class,

java/google/registry/module/pubapi/PubApiMetricsModule.java

@@ -1,25 +0,0 @@
-// Copyright 2018 The Nomulus Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package google.registry.module.pubapi;
-
-import dagger.Module;
-import javax.inject.Singleton;
-
-/**
- * Dagger module for injecting metrics. All metrics should have {@link Singleton} scope to avoid
- * being recreated per-request, as the metrics generally track cumulative values.
- */
-@Module
-public class PubApiMetricsModule {}