Use Nunito font from the server only

There are various versions of Nunito in circulation, and some have errors in
their metrics or smaller supported character sets. To ensure all users get the
expected experience, don't allow local copies of Nunito to be used.

Fixes element-hq/element-web#7959.

res/themes/dharma/css/_fonts.scss

@@ -2,7 +2,7 @@
  * Nunito.
  * Includes extended Latin and Vietnamese character sets
  * Current URLs are v9, derived from the contents of
- * https://fonts.googleapis.com/css?family=Nunito:400,400i,600,600i,700,700i&subset=latin-ext,vietnamese
+ * https://fonts.googleapis.com/css?family=Nunito:400,400i,600,600i,700,700i&subset=latin-ext,vietnamese
  */
 
 /* the 'src' links are relative to the bundle.css, which is in a subdirectory.
@@ -11,37 +11,37 @@
   font-family: 'Nunito';
   font-style: italic;
   font-weight: 400;
-  src: local('Nunito Italic'), local('Nunito-Italic'), url('../../fonts/Nunito/XRXX3I6Li01BKofIMNaDRss.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXX3I6Li01BKofIMNaDRss.ttf') format('truetype');
 }
 @font-face {
   font-family: 'Nunito';
   font-style: italic;
   font-weight: 600;
-  src: local('Nunito SemiBold Italic'), local('Nunito-SemiBoldItalic'), url('../../fonts/Nunito/XRXQ3I6Li01BKofIMN5cYtvKUTo.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXQ3I6Li01BKofIMN5cYtvKUTo.ttf') format('truetype');
 }
 @font-face {
   font-family: 'Nunito';
   font-style: italic;
   font-weight: 700;
-  src: local('Nunito Bold Italic'), local('Nunito-BoldItalic'), url('../../fonts/Nunito/XRXQ3I6Li01BKofIMN44Y9vKUTo.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXQ3I6Li01BKofIMN44Y9vKUTo.ttf') format('truetype');
 }
 @font-face {
   font-family: 'Nunito';
   font-style: normal;
   font-weight: 400;
-  src: local('Nunito Regular'), local('Nunito-Regular'), url('../../fonts/Nunito/XRXV3I6Li01BKofINeaE.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXV3I6Li01BKofINeaE.ttf') format('truetype');
 }
 @font-face {
   font-family: 'Nunito';
   font-style: normal;
   font-weight: 600;
-  src: local('Nunito SemiBold'), local('Nunito-SemiBold'), url('../../fonts/Nunito/XRXW3I6Li01BKofA6sKUYevN.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXW3I6Li01BKofA6sKUYevN.ttf') format('truetype');
 }
 @font-face {
   font-family: 'Nunito';
   font-style: normal;
   font-weight: 700;
-  src: local('Nunito Bold'), local('Nunito-Bold'), url('../../fonts/Nunito/XRXW3I6Li01BKofAjsOUYevN.ttf') format('truetype');
+  src: url('../../fonts/Nunito/XRXW3I6Li01BKofAjsOUYevN.ttf') format('truetype');
 }
 
 /*