01/03: remove test.ui mention

Author: kettanaito

exercises/01.setup/03.solution.code-coverage/README.mdx

@@ -74,9 +74,7 @@ First, I will install the `@vitest/ui` package:
 npm install @vitest/ui --save-dev
 ```
 
-And now I can preview the HTML coverage report by running Vitest in the UI mode, which means either providing the `--ui` option to the Vitest CLI or setting the `test.ui` option to `true` in `vitest.config.ts`.
-
-Once I run Vitest in the UI mode, I can go to the "Coverage" tab and preview the coverage report for my test run straight in the UI:
+And now I can preview the HTML coverage report by running Vitest in the UI mode, which means either providing the `--ui` option to the Vitest CLI. Once I run Vitest in the UI mode, I can go to the "Coverage" tab and preview the coverage report for my test run straight in the UI:
 
 ![A screenshot of the Vitest UI with the cursor hovering over the "Coverage" tab on the top left.](/assets/01-03-vitest-ui-coverage-tab.png)