Remove unnecessary "throws" declarations

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

javatests/google/registry/model/transfer/TransferDataTest.java

@@ -58,7 +58,7 @@ public class TransferDataTest {
   }
 
   @Test
-  public void test_copyConstantFieldsToBuilder() throws Exception {
+  public void test_copyConstantFieldsToBuilder() {
     TransferData constantTransferData =
         new TransferData.Builder()
             .setTransferRequestTrid(Trid.create("server-trid", "client-trid"))