Mermaid2 plugin is not required since the theme has builtin support. Removed.

ustcljh · ustcljh · commit de5fabf512df · 2025-04-26T11:46:08.000+08:00
diff --git a/mkdocs.yml b/mkdocs.yml
@@ -69,10 +69,6 @@ extra:
     provider: google
     property: G-Q8WSZQS8E1
 
-plugins:
-  - mermaid2:
-      javascript: https://unpkg.com/mermaid@10.4.0/dist/mermaid.esm.min.mjs 
-
 extra_css:
   - 'css/extra.css'
   - 'https://101.lug.ustc.edu.cn/_extra/roboto.css'
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,3 @@
 mkdocs>=1.5.3
 mkdocs-material>=9.4.6
 jieba
-mkdocs-mermaid2-plugin
