Remove unnecessary "throws" declarations

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

javatests/google/registry/model/poll/PollMessageExternalKeyConverterTest.java

@@ -57,7 +57,7 @@ public class PollMessageExternalKeyConverterTest {
   FakeClock clock = new FakeClock(DateTime.parse("2007-07-07T01:01:01Z"));
 
   @Before
-  public void setUp() throws Exception {
+  public void setUp() {
     inject.setStaticField(Ofy.class, "clock", clock);
     createTld("foobar");
     historyEntry = persistResource(new HistoryEntry.Builder()
@@ -129,7 +129,7 @@ public class PollMessageExternalKeyConverterTest {
   }
 
   @Test
-  public void testFailure_invalidEppResourceTypeId() throws Exception {
+  public void testFailure_invalidEppResourceTypeId() {
     // Populate the testdata correctly as for 1-2-FOOBAR-4-5 so we know that the only thing that
     // is wrong here is the EppResourceTypeId.
     testSuccess_domain();
@@ -139,14 +139,14 @@ public class PollMessageExternalKeyConverterTest {
   }
 
   @Test
-  public void testFailure_tooFewComponentParts() throws Exception {
+  public void testFailure_tooFewComponentParts() {
     assertThrows(
         PollMessageExternalKeyParseException.class,
         () -> parsePollMessageExternalId("1-3-EXAMPLE"));
   }
 
   @Test
-  public void testFailure_tooManyComponentParts() throws Exception {
+  public void testFailure_tooManyComponentParts() {
     assertThrows(
         PollMessageExternalKeyParseException.class,
         () -> parsePollMessageExternalId("1-3-EXAMPLE-4-5-2007-2009"));
@@ -154,7 +154,7 @@ public class PollMessageExternalKeyConverterTest {
 
 
   @Test
-  public void testFailure_nonNumericIds() throws Exception {
+  public void testFailure_nonNumericIds() {
     assertThrows(
         PollMessageExternalKeyParseException.class,
         () -> parsePollMessageExternalId("A-B-FOOBAR-D-E-F"));