fix(windows)!: remove deprecated platform

[seamlink-aalves]

Since Windows platoform has been marked as deprecated this PR removes the deprecated platform

How Has This Been Tested?

Ran cordova plugin add

[erisu]

@seamlink-aalves I think there are few other places in the repo that was missed.

E.g.

• .eslintrc.yml
• plugin.xml

  <description>Enable receiving push notifications on Android, iOS and Windows devices. Android uses Firebase Cloud Messaging. iOS uses Apple APNS Notifications. Windows uses Microsoft WNS Notifications.</description>
  

• docs\API.md
• docs\EXAMPLES.md
• docs\PAYLOAD.md
• spec\index.spec.js

If you can remove all, that would be nice. Some of the areas are sentences so you might have to modify the sentence to remove Windows reference but not delete the entire sentence.

You should be able to find all references by using windows as the search keyword..

The only place that should not be removed is from .github\workflows\ci.yml... This is just to tests if there is any issues using windows as a development environment. Not related to the Cordova-Windows platform.

[seamlink-aalves]

Hi @erisu, I've removed the remaing windows platform references.

[erisu]

LGTM