Remove the compile time flag for DATALIST Element.

Source/core/css/html.css

Index: Source/core/css/html.css
diff --git a/Source/core/css/html.css b/Source/core/css/html.css
index 65edad76326adf89aff9c931d04dbfaeac9b2b72..4ac81170b5ea17e422d6b7516369baa631933867 100644
--- a/Source/core/css/html.css
+++ b/Source/core/css/html.css
@@ -481,12 +481,6 @@ input[type="search"]::-webkit-search-results-decoration {
     margin: auto 0;
 }
 
-#if defined(ENABLE_DATALIST_ELEMENT) && ENABLE_DATALIST_ELEMENT
-datalist {
-    display: none;
-}
-#endif
-
 #if defined(ENABLE_INPUT_MULTIPLE_FIELDS_UI) && ENABLE_INPUT_MULTIPLE_FIELDS_UI
 input[type="date"] {
     -webkit-align-items: center;
@@ -870,25 +864,6 @@ input[type="color"]::-webkit-color-swatch {
     -webkit-user-modify: read-only !important;
 }
 
-#if defined(ENABLE_DATALIST_ELEMENT) && ENABLE_DATALIST_ELEMENT
-
-input[type="color"][list] {
-    -webkit-appearance: menulist;
-    width: 88px;
-    height: 23px;
-}
-
-input[type="color"][list]::-webkit-color-swatch-wrapper {
-    padding-left: 8px;
-    padding-right: 24px;
-}
-
-input[type="color"][list]::-webkit-color-swatch {
-    border-color: #000000;
-}
-
-#endif // defined(ENABLE_DATALIST_ELEMENT) && ENABLE_DATALIST_ELEMENT
-
 #endif // defined(ENABLE_INPUT_TYPE_COLOR) && ENABLE_INPUT_TYPE_COLOR
 
 #if defined(ENABLE_CALENDAR_PICKER) && ENABLE_CALENDAR_PICKER