Remove unnecessary "pub get" step from readme

Author: DanTup

containers/dart/README.md

@@ -38,10 +38,9 @@ This definition includes some test code that will help you verify it is working
 2. Clone this repository.
 3. Start VS Code, press <kbd>F1</kbd>, and select **Remote-Containers: Open Folder in Container...**
 4. Select the `containers/dart` folder.
-5. After the folder has opened in the container, press <kbd>F1</kbd>, and select **Pub: Get Packages** to download packages
-6. After packages have been downloaded, press <kbd>F5</kbd> to start the project and launch the browser.
-7. You should see "Hello remote world!" after the page loads.
-8. From here, you can add breakpoints or edit the contents of the `test-project` folder to do further testing.
+5. After the folder has opened in the container, press <kbd>F5</kbd> to start the project and launch the browser.
+6. You should see "Hello remote world!" after the page loads.
+7. From here, you can add breakpoints or edit the contents of the `test-project` folder to do further testing.
 
 ## License