Remove deprecated extra flow logic and TLD-specific pricing proxy

This also adds a domain update pricing hook to DomainPricingCustomLogic.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=142286755

java/google/registry/flows/domain/DomainApplicationCreateFlow.java

@@ -44,7 +44,6 @@ import static google.registry.model.ofy.ObjectifyService.ofy;
 import static google.registry.model.registry.label.ReservedList.matchesAnchorTenantReservation;
 
 import com.google.common.base.Function;
-import com.google.common.base.Optional;
 import com.google.common.collect.FluentIterable;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
@@ -260,8 +259,6 @@ public final class DomainApplicationCreateFlow implements TransactionalFlow {
         .build();
     HistoryEntry historyEntry = buildHistory(newApplication.getRepoId(), command.getPeriod(), now);
     ImmutableSet.Builder<ImmutableObject> entitiesToSave = new ImmutableSet.Builder<>();
-    handleExtraFlowLogic(
-        registry.getTldStr(), command.getPeriod().getValue(), historyEntry, newApplication);
     entitiesToSave.add(
         newApplication,
         historyEntry,
@@ -383,21 +380,6 @@ public final class DomainApplicationCreateFlow implements TransactionalFlow {
     return responseExtensionsBuilder.build();
   }
 
-  private void handleExtraFlowLogic(
-      String tld, int years, HistoryEntry historyEntry, DomainApplication newApplication)
-          throws EppException {
-    Optional<RegistryExtraFlowLogic> extraFlowLogic =
-        RegistryExtraFlowLogicProxy.newInstanceForTld(tld);
-    if (extraFlowLogic.isPresent()) {
-      extraFlowLogic.get().performAdditionalApplicationCreateLogic(
-          newApplication,
-          clientId,
-          years,
-          eppInput,
-          historyEntry);
-    }
-  }
-
   /** Landrush applications are disallowed during sunrise. */
   static class LandrushApplicationDisallowedDuringSunriseException
       extends RequiredParameterMissingException {