Remove unnecessary "throws" declarations

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

javatests/google/registry/tools/LoadTestCommandTest.java

@@ -35,7 +35,7 @@ public class LoadTestCommandTest extends CommandTestCase<LoadTestCommand> {
   Connection connection = mock(Connection.class);
 
   @Before
-  public void setUp() throws Exception {
+  public void setUp() {
     command.setConnection(connection);
     createTld("example");
     persistNewRegistrar("acme", "ACME", Registrar.Type.REAL, 99L);