Remove unnecessary "throws" declarations

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

javatests/google/registry/testing/mapreduce/MapreduceTestCase.java

@@ -80,7 +80,7 @@ public abstract class MapreduceTestCase<T> extends ShardableTestCase {
       .build();
 
   @Before
-  public void setUp() throws Exception {
+  public void setUp() {
     taskQueue = LocalTaskQueueTestConfig.getLocalTaskQueue();
     ApiProxyLocal proxy = (ApiProxyLocal) ApiProxy.getDelegate();
     // Creating files is not allowed in some test execution environments, so don't.