retire /v1/config

It's been supplanted by /v2/config for all clients beyond the 90-day window.
We still have [some traffic](https://signal.grafana.net/goto/bf5tjk346v1moa?orgId=1)
but it's all from expired/third-party clients (note the lack of a recognized
version number in the client-version tag).

Author: jkt-signal

service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java

@@ -125,7 +125,6 @@
 import org.whispersystems.textsecuregcm.controllers.ProvisioningController;
 import org.whispersystems.textsecuregcm.controllers.RegistrationController;
 import org.whispersystems.textsecuregcm.controllers.RemoteConfigController;
-import org.whispersystems.textsecuregcm.controllers.RemoteConfigControllerV1;
 import org.whispersystems.textsecuregcm.controllers.SecureStorageController;
 import org.whispersystems.textsecuregcm.controllers.SecureValueRecovery2Controller;
 import org.whispersystems.textsecuregcm.controllers.StickerController;
@@ -1097,7 +1096,6 @@ public void run(WhisperServerConfiguration config, Environment environment) thro
         new ProvisioningController(rateLimiters, provisioningManager),
         new RegistrationController(accountsManager, phoneVerificationTokenManager, registrationLockVerificationManager,
             rateLimiters),
-        new RemoteConfigControllerV1(remoteConfigsManager, config.getRemoteConfigConfiguration().globalConfig(), clock),
         new RemoteConfigController(remoteConfigsManager, config.getRemoteConfigConfiguration().globalConfig(), clock),
         new SecureStorageController(storageCredentialsGenerator),
         new SecureValueRecovery2Controller(svr2CredentialsGenerator, accountsManager),