docs: update instructions to try dev build of Jest in another project (…

…#10831)

CONTRIBUTING.md

@@ -158,13 +158,6 @@ In order to accept your pull request, we need you to submit a CLA. You only need
 
 ## How to try a development build of Jest in another project
 
-To link `jest` on the command line to `jest-cli/bin/jest.js` in a development build:
-
-```sh-session
-$ cd /path/to/your/Jest_clone/packages/jest-cli
-$ yarn link
-```
-
 To build Jest:
 
 ```sh-session
@@ -184,20 +177,11 @@ To run tests in another project with the development build of Jest:
 ```sh-session
 $ cd /path/to/another/project
 
-# link development build to the other project
-$ yarn link jest-cli
-
-$ jest [options] # run jest-cli/bin/jest.js in the development build
+$ node /path/to/your/JestClone/packages/jest/bin/jest [options] # run jest-cli/bin/jest.js in the development build
 ```
 
 - To decide whether to specify any options, see `test` under `scripts` in the `package.json` file of the other project.
 
-To unlink `jest` on the command line from `jest-cli/bin/jest.js` in a development build:
-
-```sh
-yarn unlink jest-cli
-```
-
 ## Bugs
 
 ### Where to Find Known Issues