Remove custom build option

vite.config.js

@@ -1,7 +1,6 @@
 import { defineConfig } from 'vite';
 import react from '@vitejs/plugin-react';
 import postcss from './postcss.config.js';
-import path from 'path';
 
 // https://vitejs.dev/config/
 export default defineConfig({
@@ -12,16 +11,4 @@ export default defineConfig({
   css: {
     postcss,
   },
-  build: {
-    lib: {
-      entry: path.resolve(__dirname, 'src/App.jsx'),
-      name: 'MyLib',
-      fileName: (format) => `my-lib.${format}.js`,
-    },
-    rollupOptions: {
-      // make sure to externalize deps that shouldn't be bundled
-      // into your library
-      external: ['react', 'react-dom'],
-    },
-  },
 });