Remove removeViewBox override

`removeViewBox` is no longer enabled by default in SVGO v4, so we don't need to
disable it. See https://svgo.dev/docs/migrations/migration-from-v3-to-v4/.

With this change `scripts/generate-icons.js` can be run with svgo 4.0.0 with no
output changes compared to v3.

Author: robertknight

scripts/generate-icons.js

@@ -34,13 +34,6 @@ function generateIcon(name, src, inputFileName) {
     plugins: [
       {
         name: 'preset-default',
-        params: {
-          overrides: {
-            // View boxes are needed for some icons to be able to render
-            // them at different sizes
-            removeViewBox: false,
-          },
-        },
       },
     ],
   });