fix lint errors

packages/editor/src/services/codemirror-editor/use-codemirror-editor/use-codemirror-editor.ts

@@ -1,4 +1,4 @@
-import { useEffect, useMemo } from 'react';
+import { useMemo } from 'react';
 
 import { markdown, markdownLanguage } from '@codemirror/lang-markdown';
 import { languages } from '@codemirror/language-data';