💄(frontend) remove Marianne font

The Marianne font is pretty specific to the DINUM instance and shouldn't
really be there as default in the repo. We can use a custom CSS file to
load Marianne if needed on a specific instance.

src/frontend/panda.config.ts

@@ -190,7 +190,6 @@ const config: Config = {
       fonts: {
         sans: {
           value: [
-            'Marianne',
             'Source Sans',
             'Source Sans fallback',
             'ui-sans-serif',

src/frontend/src/styles/fonts.css

@@ -30,46 +30,6 @@
   font-display: swap;
 }
 
-@font-face {
-  font-family: 'Marianne';
-  src: url('/fonts/Marianne-Regular-subset.woff2') format('woff2');
-  font-weight: 400;
-  font-style: normal;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Marianne';
-  src: url('/fonts/Marianne-Regular_Italic-subset.woff2') format('woff2');
-  font-weight: 400;
-  font-style: italic;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Marianne';
-  src: url('/fonts/Marianne-Medium-subset.woff2') format('woff2');
-  font-weight: 500;
-  font-style: normal;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Marianne';
-  src: url('/fonts/Marianne-Bold-subset.woff2') format('woff2');
-  font-weight: 700;
-  font-style: normal;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'Marianne';
-  src: url('/fonts/Marianne-ExtraBold-subset.woff2') format('woff2');
-  font-weight: 800;
-  font-style: normal;
-  font-display: swap;
-}
-
 /*
 * to reduce CLS
 * values taken from https://github.com/khempenius/font-fallbacks-dataset/blob/main/font-metric-overrides.csv#L2979