Removing DateTimeInputElement.

tests/html/input_element_test.dart

 library input_element_test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 void check(InputElement element, String type, [bool supported = true]) {
   expect(element is InputElement, true);
   if (supported) {
     expect(element.type, type);
   } else {
@@ skipping 21 matching lines @@
       expect(TelephoneInputElement.supported, true);
     });
   });
 
   group('supported_email', () {
     test('supported', () {
       expect(EmailInputElement.supported, true);
     });
   });
 
-  group('supported_datetime', () {
-    test('supported', () {
-      expect(DateTimeInputElement.supported, true);
-    });
-  });
-
   group('supported_date', () {
     test('supported', () {
       expect(DateInputElement.supported, true);
     });
   });
 
   group('supported_month', () {
     test('supported', () {
       expect(MonthInputElement.supported, true);
     });
@@ skipping 52 matching lines @@
     });
 
     test('email', () {
       check(new EmailInputElement(), 'email', EmailInputElement.supported);
     });
 
     test('password', () {
       check(new PasswordInputElement(), 'password');
     });
 
-    test('datetime', () {
-      check(new DateTimeInputElement(), 'datetime',
-          DateTimeInputElement.supported);
-    });
-
     test('date', () {
       check(new DateInputElement(), 'date', DateInputElement.supported);
     });
 
     test('month', () {
       check(new MonthInputElement(), 'month', MonthInputElement.supported);
     });
 
     test('week', () {
       check(new WeekInputElement(), 'week', WeekInputElement.supported);
@@ skipping 38 matching lines @@
 
     test('reset', () {
       check(new ResetButtonInputElement(), 'reset');
     });
 
     test('button', () {
       check(new ButtonInputElement(), 'button');
     });
   });
 }