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.

cas/src/test/java/org/springframework/security/cas/authentication/CasAuthenticationProviderTests.java

@@ -418,8 +418,7 @@ public class CasAuthenticationProviderTests {
 			this.returnTicket = returnTicket;
 		}
 
-		public Assertion validate(final String ticket, final String service)
-				throws TicketValidationException {
+		public Assertion validate(final String ticket, final String service) {
 			if (returnTicket) {
 				return new AssertionImpl("rod");
 			}

cas/src/test/java/org/springframework/security/cas/jackson2/CasAuthenticationTokenMixinTests.java

@@ -128,7 +128,7 @@ public class CasAuthenticationTokenMixinTests {
 	}
 
 	@Test
-	public void deserializeCasAuthenticationTest() throws IOException, JSONException {
+	public void deserializeCasAuthenticationTest() throws IOException {
 		CasAuthenticationToken token = mapper.readValue(CAS_TOKEN_JSON, CasAuthenticationToken.class);
 		assertThat(token).isNotNull();
 		assertThat(token.getPrincipal()).isNotNull().isInstanceOf(User.class);