Update README.md

Author: juzhiyuan

README.md

@@ -64,6 +64,7 @@ Dashboard for APISIX & based on ElementUI.
 ```
 
 ## Project setup
+> Make sure Yarn is installed on your machine: https://yarnpkg.com/en/docs/install
 
 ### Install dependencies
 
@@ -89,24 +90,6 @@ yarn run build:prod
 yarn run lint
 ```
 
-### Run your unit tests
-
-```bash
-yarn run test:unit
-```
-
-### Run your end-to-end tests
-
-```bash
-yarn run test:e2e
-```
-
-### Generate all svg components
-
-```bash
-yarn run svg
-```
-
 ### Customize Vue configuration
 
 See [Configuration Reference](https://cli.vuejs.org/config/).