Disable azure-cli-extensions CI check. (#15862)

Author: kairu-ms

specificationRepositoryConfiguration.json

@@ -43,10 +43,6 @@
       "integrationRepository": "AzureSDKAutomation/azure-sdk-for-python",
       "mainRepository": "Azure/azure-sdk-for-python"
     },
-    "azure-cli-extensions": {
-      "integrationRepository": "AzureSDKAutomation/azure-cli-extensions",
-      "mainRepository": "Azure/azure-cli-extensions"
-    },
     "azure-resource-manager-schemas": {
       "integrationRepository": "AzureSDKAutomation/azure-resource-manager-schemas",
       "mainRepository": "Azure/azure-resource-manager-schemas"
@@ -89,10 +85,6 @@
         "azure-sdk-for-python-track2": {
           "integrationRepository": "azure-sdk/azure-sdk-for-python-pr",
           "mainRepository": "Azure/azure-sdk-for-python-pr"
-        },
-        "azure-cli-extensions": {
-          "integrationRepository": "azure-sdk/azure-cli-extensions-pr",
-          "mainRepository": "Azure/azure-cli-extensions-pr"
         }
       }
     }