Fix: Remove unused icon libraries in django-filer 3.0.0rc1 (#1369)

* Fix: Loading correct icon libraries in django-filer 3.0.0rc1

* Fix: Remove unused icon css

Author: fsbraun

filer/templates/admin/filer/delete_confirmation.html

@@ -2,7 +2,6 @@
 {% load i18n static %}
 
 {% block extrastyle %}{{ block.super }}
-    <link rel="stylesheet" type="text/css" href="{% static 'filer/css/admin_filer.icons.css' %}">
     <link rel="stylesheet" type="text/css" href="{% static 'filer/css/admin_filer.css' %}">
 {% endblock %}
 

filer/templates/admin/filer/folder/choose_move_destination.html

@@ -8,7 +8,6 @@
 {% block extrastyle %}
     {{ block.super }}
     <link rel="stylesheet" type="text/css" href="{% static 'admin/css/forms.css' %}">
-    <link rel="stylesheet" type="text/css" href="{% static 'filer/css/admin_filer.icons.css' %}">
     <link rel="stylesheet" type="text/css" href="{% static 'filer/css/admin_filer.css' %}">
 {% endblock %}