Question

How to delete my custom portal settings in azure

Answer 1

In order to delete your portal settings:

1. Sign in to the Azure portal.

2. In the header of the portal, select Settings.

3. Select Delete all settings and private dashboards.

This will delete all links to private dashboards and other custom settings you've made to the portal. 

For more info refer to https://docs.microsoft.com/en-in/azure/azure-portal/azure-portal-export-delete-settings