remove css material theme

it4i_theme/base.html

@@ -62,7 +62,6 @@
       {% set text = config.extra.get("font", {}).text | default("Ubuntu") %}
       {% set code = config.extra.get("font", {}).code | default("Ubuntu Mono") %}
       {% set font = text + ':400,700|' + code | replace(' ', '+') %}
-      <link rel="stylesheet" href="https://fonts.googleapis.com/css?family={{ font }}">
       <style>
         body, input {
           font-family: '{{ text }}', Helvetica, Arial, sans-serif;