Remove more unnecessary "throws" declarations

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201243722

java/google/registry/tools/CreateOrUpdateTldCommand.java

@@ -272,7 +272,7 @@ abstract class CreateOrUpdateTldCommand extends MutatingCommand {
   protected abstract void initTldCommand();
 
   @Override
-  protected final void init() throws Exception {
+  protected final void init() {
     assertAllowedEnvironment();
     initTldCommand();
     String duplicates = Joiner.on(", ").join(findDuplicates(mainParameters));