fix: remove custom styles for unordered lists in example editor

Author: Sembauke

mobile-app/lib/ui/views/learn/widgets/example_editor.dart

@@ -34,9 +34,6 @@ class ExampleEditor extends StatelessWidget {
                       '*': Style(
                         fontSize: FontSize(18),
                       ),
-                      'ul': Style(
-                          fontSize: FontSize(18),
-                          padding: HtmlPaddings.only(left: 10))
                     },
                   ),
                 );