Don't load both galleria.classic.css & minified

Fixes regression introduced in 6c5c4ed

sigal/themes/galleria/templates/index.html

@@ -10,7 +10,7 @@
     <meta name="viewport" content="width=device-width">
 
     <link rel="stylesheet" href="{{ theme.url }}/css/normalize.css">
-    <link rel="stylesheet" href="{{ theme.url }}/themes/classic/galleria.classic.min.css">
+    <link rel="stylesheet" href="{{ theme.url }}/themes/classic/galleria.classic.css">
     <link rel="stylesheet" href="{{ theme.url }}/css/style.css">
 
     {% if settings.show_map and album.show_map %}