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,