Remove redundant throws clauses

Removes exceptions that are declared in a method's signature but never thrown by the method itself or its implementations/derivatives.

samples/xml/gae/src/test/java/samples/gae/security/AppRoleTests.java

@@ -34,7 +34,7 @@ public class AppRoleTests {
 	}
 
 	@Test
-	public void bitsAreCorrect() throws Exception {
+	public void bitsAreCorrect() {
 		// If this fails, someone has modified the Enum and the Datastore is probably
 		// corrupt!
 		assertThat(ADMIN.getBit()).isZero();

samples/xml/gae/src/test/java/samples/gae/users/GaeDataStoreUserRegistryTests.java

@@ -35,12 +35,12 @@ public class GaeDataStoreUserRegistryTests {
 			new LocalDatastoreServiceTestConfig());
 
 	@Before
-	public void setUp() throws Exception {
+	public void setUp() {
 		helper.setUp();
 	}
 
 	@After
-	public void tearDown() throws Exception {
+	public void tearDown() {
 		helper.tearDown();
 	}