Remove unnecessary "throws" declarations

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

java/google/registry/tools/GetSchemaTreeCommand.java

@@ -51,7 +51,7 @@ final class GetSchemaTreeCommand implements Command {
   private Multimap<Class<?>, Class<?>> superclassToSubclasses;
 
   @Override
-  public void run() throws Exception {
+  public void run() {
     // Get the @Parent type for each class.
     Map<Class<?>, Class<?>> entityToParentType = new HashMap<>();
     for (Class<?> clazz : ALL_CLASSES) {