docs: clean up legacy scripts

Author: meteorlxy

docs/contributing.md

@@ -70,7 +70,7 @@ You may need to run this script first after your clone this repository, because
 
 ### `pnpm clean`
 
-The `clean` script runs `clean` script in all packages, cleaning all the dist files and caches. In other words, it will remove all the files that generated by `build`, `copy` and `dev` scripts.
+The `clean` script runs `clean` script in all packages, cleaning all the dist files and caches. In other words, it will remove all the files that generated by `build`, `copy` scripts.
 
 It's used before you want to re-build source files from a clean / initial state.
 

docs/zh/contributing.md

@@ -74,10 +74,6 @@ pnpm docs:dev
 
 当你想要从最初状态重新构建源代码时，你可以执行该命令。
 
-### `pnpm dev:*`
-
-`dev:` 前缀表明，这些命令是针对开发使用的，将会以监听模式运行对应的脚本。
-
 ### `pnpm docs:*`
 
 #### `pnpm docs:build`, `pnpm docs:dev`, `pnpm docs:clean`