Remove use of sass_tags

aleksis/apps/paweljong/templates/paweljong/invoice_pdf.html

 {# -*- engine:django -*- #}
 
-{% load i18n static any_js sass_tags %}
+{% load i18n static any_js %}
 {% load render_table from django_tables2 %}
 
 {% get_current_language as LANGUAGE_CODE %}
@@ -24,7 +24,7 @@
   {% include_css "Roboto700" %}
   {% include_css "Roboto900" %}
   {% include_css "paper-css" %}
-  <link rel="stylesheet" href="{% sass_src 'public/style.scss' %}"/>
+  <link rel="stylesheet" href="{% static 'style.css' %}"/>
   <link rel="stylesheet" href="{% static "print.css" %}"/>
 
   <style>