Remove unnecessary "throws" declarations

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201058582

java/google/registry/tools/CreateOrUpdatePremiumListCommand.java

@@ -81,7 +81,7 @@ abstract class CreateOrUpdatePremiumListCommand extends ConfirmingCommand
   }
 
   @Override
-  protected String prompt() throws Exception {
+  protected String prompt() {
     return String.format(
         "You are about to save the premium list %s with %d items: ", name, inputLineCount);
   }