Remove unnecessary "throws" declarations

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

java/google/registry/tools/HelpCommand.java

@@ -36,7 +36,7 @@ final class HelpCommand implements Command {
   private List<String> mainParameters = new ArrayList<>();
 
   @Override
-  public void run() throws Exception {
+  public void run() {
     String target = getOnlyElement(mainParameters, null);
     if (target == null) {
       jcommander.usage();