Rollback font optimization changes

docs/_template/light-dark-theme/styles/master.css

@@ -1,18 +1,9 @@
-@font-face{
-    font-family: 'Titillium Web';
-    font-display: optional;
-    src: local('Titillium Web'), url('https://fonts.googleapis.com/css?family=Titillium+Web')
-}
-
-@font-face{
-    font-family: 'Noto Sans';
-    font-display: optional;
-    src: local('Noto Sans'), url('https://fonts.googleapis.com/css?family=Noto+Sans')
-}
+@import url('https://fonts.googleapis.com/css?family=Titillium+Web|Noto+Sans');
 
 html,
 body {
     font-family: 'Titillium Web', 'Segoe UI', Tahoma, Helvetica, sans-serif;
+    font-display: optional;
     height: 100%;
     font-size: 15px;
 }