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/main/java/samples/gae/security/GaeAuthenticationFilter.java

@@ -120,7 +120,7 @@ public class GaeAuthenticationFilter extends GenericFilterBean {
 	}
 
 	@Override
-	public void afterPropertiesSet() throws ServletException {
+	public void afterPropertiesSet() {
 		Assert.notNull(authenticationManager, "AuthenticationManager must be set");
 	}
 

samples/xml/gae/src/main/java/samples/gae/security/GoogleAccountsAuthenticationEntryPoint.java

@@ -30,7 +30,7 @@ import com.google.appengine.api.users.UserServiceFactory;
 public class GoogleAccountsAuthenticationEntryPoint implements AuthenticationEntryPoint {
 
 	public void commence(HttpServletRequest request, HttpServletResponse response,
-			AuthenticationException authException) throws IOException, ServletException {
+			AuthenticationException authException) throws IOException {
 		UserService userService = UserServiceFactory.getUserService();
 
 		response.sendRedirect(userService.createLoginURL(request.getRequestURI()));