Remove unused cypress plugin file

cypress/plugins/index.js

@@ -1,13 +0,0 @@
-const path = require('path');
-const { startDevServer } = require('@cypress/vite-dev-server');
-
-module.exports = (on, config) => {
-  on('dev-server:start', (options) => {
-    return startDevServer({
-      options,
-      viteConfig: {
-        configFile: path.resolve(__dirname, '..', '..', 'vite.config.js'),
-      },
-    });
-  });
-};