remove font-display: swap property on font declrations

.eleventy.js

@@ -34,6 +34,12 @@ module.exports = function (eleventyConfig, rest) {
         postcssAtImport,
         autoprefixer,
         postcssPresetEnv({ browsers: 'defaults,not IE 11' }),
+        (css, result) => {
+          result.root.walk((node) => {
+            if (node.type === 'decl' && node.prop === 'font-display') node.remove()
+          })
+          return result
+        },
         cssnano({ preset: cssnanoPreset })
       ])
         .process(inputContent, { from: inputPath, to: '_site/assets/css/main.css' })