Remove environment variable I thought I got last commit

Author: zooba

windows-release/sign-files.yml

@@ -48,7 +48,6 @@ steps:
           "##vso[task.setvariable variable=AZURE_CLIENT_ID;issecret=true]${env:servicePrincipalId}"
           "##vso[task.setvariable variable=AZURE_ID_TOKEN;issecret=true]${env:idToken}"
           "##vso[task.setvariable variable=AZURE_TENANT_ID;issecret=true]${env:tenantId}"
-          "##vso[task.setvariable variable=AZURE_TOKEN_CREDENTIALS]AzureCliCredential"
         addSpnToEnvironment: true
 
     - powershell: >