chore: remove reference to tsd [ci skip]

close vuejs#7077

Author: yyx990803

.github/contributing.md

@@ -267,8 +267,6 @@ Test coverage is continuously deployed at https://vue-next-coverage.netlify.app/
 
 ### Testing Type Definition Correctness
 
-This project uses [tsd](https://github.com/SamVerschueren/tsd) to test the built definition files (`*.d.ts`).
-
 Type tests are located in the `test-dts` directory. To run the dts tests, run `nr test-dts`. Note that the type test requires all relevant `*.d.ts` files to be built first (and the script does it for you). Once the `d.ts` files are built and up-to-date, the tests can be re-run by simply running `nr test-dts`.
 
 ## Financial Contribution

package.json

@@ -31,9 +31,6 @@
     "postinstall": "simple-git-hooks"
   },
   "types": "test-dts/index.d.ts",
-  "tsd": {
-    "directory": "test-dts"
-  },
   "simple-git-hooks": {
     "pre-commit": "pnpm lint-staged",
     "commit-msg": "node scripts/verifyCommit.mjs"