Theme update. Cleanup configuration

config/_default/params.yaml

@@ -1,7 +1,6 @@
 # Appearance
 appearance:
   theme_day: ocean
-#  theme_night: ocean
   font: minimal
   font_size: M
 
@@ -71,9 +70,9 @@ footer:
       allow_commercial: false
 
 # Site features
-features: 
-  privacy_pack:
-    enable: false
+features:
+  syntax_highlighter:
+    enable: true
   map:
     provider: 'mapnik'
     api_key: ''
@@ -83,9 +82,6 @@ extensions:
   academicons:
     enable: false
 
-highlight: true
-math: false
-diagram: true
 show_related:
   book: true
   page: false
@@ -100,9 +96,6 @@ sharing: false
 
 abstract_length: 135
 plugins_js: []
-avatar:
-  gravatar: false
-  shape: circle
 publications:
   date_format: January 2006
   citation_style: apa
@@ -112,4 +105,4 @@ projects:
   talk_view: 2
 breadcrumb:
   page_types:
-    book: true
+    book: true