Remove prepare_windows_host_for_app_distribution.ps1 and its tests

h/t @AliSoftware #196 (comment) -- this is now done in the AMI itself. Since this plugin is versioned and apps use a pinned version, we can safely remove the scripts.

Author: iangmaia

.buildkite/pipeline-windows-tests.yml

@@ -109,11 +109,3 @@ steps:
         notify:
           - github_commit_status:
               context: "install_python Tests - Basic dry run with Chocolatey available"
-
-  - label: ":windows: prepare_windows_host_for_app_distribution Tests - Skip Windows 10 SDK Installation"
-    command: .\tests\test_prepare_windows_host_for_app_distribution.ps1
-    agents:
-      queue: windows
-    notify:
-      - github_commit_status:
-          context: "prepare_windows_host_for_app_distribution Tests - Skip Windows 10 SDK Installation"

CHANGELOG.md

@@ -34,7 +34,7 @@ _None._
 
 ### Breaking Changes
 
-_None._
+- We've removed the `prepare_windows_host_for_app_distribution.ps1` script as this functionality is now implemented in the Windows AMI itself. [#196]
 
 ### New Features