Update demo.md

As part of our focus on making Azure more Linux-friendly, we are removing mentions of PuTTY unless PuTTY is required.

Author: cynthn

articles/virtual-machines/workloads/mainframe-rehosting/ibm/demo.md

@@ -68,7 +68,7 @@ Now that you have the package(s), you must upload them to your VM on Azure.
 
 2. Select the **SSH** tab, and then copy the ssh command to the clipboard.
 
-3. Log on to your VM using your credentials and the [SSH client](../../../linux/use-remote-desktop.md) of choice. This demo uses the Linux extensions for Windows 10, which adds a bash shell to the Windows command prompt. PuTTY works just as well.
+3. Log on to your VM using your credentials and the [SSH client](../../../linux/use-remote-desktop.md) of choice. This demo uses the Linux extensions for Windows 10, which adds a bash shell to the Windows command prompt.
 
 4. When logged on, create a directory to upload the IBM packages. Keep in mind Linux is case sensitive. For example, this demo assumes the packages are uploaded to:
 
@@ -195,4 +195,4 @@ Congratulations! You are now running an IBM mainframe environment on Azure.
 [microfocus-demo]: /microfocus/demo.md
 [ibm-get-started]: /ibm/get-started.md
 [ibm-install-z]: install-ibm-z-environment.md
-[ibm-demo]: /ibm/demo.md
+[ibm-demo]: /ibm/demo.md