Remove unnecessary "throws" declarations

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

javatests/google/registry/request/RequestHandlerTest.java

@@ -225,7 +225,7 @@ public final class RequestHandlerTest {
   }
 
   @After
-  public void after() throws Exception {
+  public void after() {
     verifyNoMoreInteractions(rsp, bumblebeeTask, slothTask, safeSlothTask);
   }