Remove unnecessary "throws" declarations

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

javatests/google/registry/reporting/icann/IcannReportingUploadActionTest.java

@@ -141,7 +141,7 @@ public class IcannReportingUploadActionTest {
                 + "a-activity-201706.csv - FAILURE");
   }
   @Test
-  public void testFail_FileNotFound() throws Exception {
+  public void testFail_FileNotFound() {
     IcannReportingUploadAction action = createAction();
     action.subdir = "somewhere/else";
     IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class, action::run);