Directory.Read.All is no longer required to read sign in logs in Graph

Directory.Read.All was previously required for license checks because there was a known issue with the API. But Ben has confirmed that the issue is now resolved.
We've also removed the known issue reference from Microsoft Graph docs via https://github.com/microsoftgraph/microsoft-graph-docs/pull/20858/files, https://github.com/microsoftgraph/microsoft-graph-docs/pull/20842/files, microsoftgraph/microsoft-graph-docs@fd44a5d
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cc: @shlipsey3

Author: FaithOmbongi

articles/active-directory/reports-monitoring/howto-manage-inactive-user-accounts.md

@@ -57,7 +57,6 @@ The following details relate to the `lastSignInDateTime` property.
 
 - To read the property, you need to grant the app the following Microsoft Graph permissions: 
     - AuditLog.Read.All
-    - Directory.Read.All  
     - User.Read.All
 
 - Each interactive sign-in that was successful results in an update of the underlying data store. Typically, successful sign-ins show up in the related sign-in report within 10 minutes.