Removing references to installing extension

Author: lisaguthrie

articles/azure-app-configuration/scripts/cli-create-service.md

@@ -21,10 +21,6 @@ This sample script creates a new instance of Azure App Configuration in a new re
 
 If you choose to install and use the CLI locally, this article requires that you are running the Azure CLI version 2.0 or later. Run `az --version` to find the version. If you need to install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
 
-You need to install the Azure App Configuration CLI extension first by executing the following command:
-
-        az extension add -n appconfig
-
 ## Sample script
 
 ```azurecli-interactive

articles/azure-app-configuration/scripts/cli-delete-service.md

@@ -28,10 +28,6 @@ This sample script deletes an instance of Azure App Configuration.
 
 If you choose to install and use the CLI locally, this article requires that you are running the Azure CLI version 2.0 or later. Run `az --version` to find the version. If you need to install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
 
-You need to install the Azure App Configuration CLI extension first by executing the following command:
-
-        az extension add -n appconfig
-
 ## Sample script
 
 ```azurecli-interactive

articles/azure-app-configuration/scripts/cli-export.md

@@ -28,10 +28,6 @@ This sample script exports key-values from an Azure App Configuration store.
 
 If you choose to install and use the CLI locally, this article requires that you are running the Azure CLI version 2.0 or later. Run `az --version` to find the version. If you need to install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
 
-You need to install the Azure App Configuration CLI extension first by executing the following command:
-
-        az extension add -n appconfig
-
 ## Sample script
 
 ```azurecli-interactive

articles/azure-app-configuration/scripts/cli-import.md

@@ -28,10 +28,6 @@ This sample script imports key-value settings to an Azure App Configuration stor
 
 If you choose to install and use the Azure CLI locally, this article requires that you are running the Azure CLI version 2.0 or later. Run `az --version` to find the version. To install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
 
-You need to install the Azure App Configuration CLI extension first by executing the following command:
-
-        az extension add -n appconfig
-
 ## Sample script
 
 ```azurecli-interactive

articles/azure-app-configuration/scripts/cli-work-with-keys.md

@@ -28,10 +28,6 @@ This sample script creates a new key-value in an Azure App Configuration store,
 
 If you choose to install and use the CLI locally, this article requires that you are running the Azure CLI version 2.0 or later. Run `az --version` to find the version. If you need to install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
 
-You need to install the Azure App Configuration CLI extension first by executing the following command:
-
-        az extension add -n appconfig
-
 ## Sample script
 
 ```azurecli-interactive