Remove unnecessary "throws" declarations

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

java/google/registry/tools/GetSchemaCommand.java

@@ -21,7 +21,7 @@ import google.registry.model.SchemaVersion;
 @Parameters(commandDescription = "Generate a model schema file")
 final class GetSchemaCommand implements Command {
   @Override
-  public void run() throws Exception {
+  public void run() {
     System.out.println(SchemaVersion.getSchema());
   }
 }