refactor!: remove next.js (#3267)

scripts/vitest/next-config-mock.ts

@@ -1,21 +0,0 @@
-import {
-  blockSuiteFeatureFlags,
-  buildFlags,
-  // @ts-expect-error
-} from '@affine/web/preset.config.mjs';
-
-export default function getConfig() {
-  return {
-    publicRuntimeConfig: {
-      PROJECT_NAME: 'AFFiNE Mock',
-      BUILD_DATE: '2021-09-01T00:00:00.000Z',
-      gitVersion: 'UNKNOWN',
-      hash: 'UNKNOWN',
-      appVersion: '0.0.0',
-      editorVersion: '0.0.0',
-      serverAPI: 'http://127.0.0.1:3000/',
-      editorFlags: blockSuiteFeatureFlags,
-      ...buildFlags,
-    },
-  };
-}