refactor: environment setup (#2898)

Co-authored-by: Simon He <57086651+Simon-He95@users.noreply.github.com>

apps/web/src/utils/create-emotion-cache.ts

@@ -1,8 +1,6 @@
-import { env } from '@affine/env';
+import { isBrowser } from '@affine/env/constant';
 import createCache from '@emotion/cache';
 
-const isBrowser = env.isBrowser;
-
 export default function createEmotionCache() {
   let insertionPoint;