Although you cannot remove this feature, you can customize it to make it more comfortable. This area holds up to six items, but you can click the More button to access more content (if applicable). The 'Recommended' section is where you will find suggestions of recently opened files and installed apps. If this is a classic app, you may need to continue with the on-screen directions to complete the uninstall process. If this is a Microsoft Store app, the app will be removed without further steps. If you don't want a particular app in the Pinned section or want to get rid of it, right-click the app and select the Unpin from Start or Uninstall button.
Source: Windows Central (Image credit: Source: Windows Central)