As Track 1 Azure SDK has been deprecated and out of maintenance (public announcement?), azure-cli-core needs to drop Track 1 SDK support.

The extended Track 1 SDK support in MSAL-based Azure CLI adds tons of extra maintenance effort for

• MSAL authentication for Track 1 SDK, including ADAL's resource for backward compatibility
• Cross-tenant authentication for Track 1 SDK
• Continuous Access Evaluation for Track 1 SDK