Remove another instance of redundant Vite Sass config (#1391)

electron.vite.config.ts

@@ -76,12 +76,5 @@ export default defineConfig({
                 targets: [{ src: "node_modules/monaco-editor/min/vs/*", dest: "monaco" }],
             }),
         ],
-        css: {
-            preprocessorOptions: {
-                scss: {
-                    api: "modern-compiler", // or "modern"
-                },
-            },
-        },
     },
 });