Remove more unnecessary "throws" declarations

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201243722

javatests/google/registry/export/LoadSnapshotActionTest.java

@@ -96,7 +96,7 @@ public class LoadSnapshotActionTest {
   }
 
   @Test
-  public void testSuccess_enqueueLoadTask() throws Exception {
+  public void testSuccess_enqueueLoadTask() {
     enqueueLoadSnapshotTask(
         "id12345", "gs://bucket/snapshot.backup_info", ImmutableSet.of("one", "two", "three"));
     assertTasksEnqueued(