build: choco: add chocolateyUninstall.ps1

build/choco/chocolateyUninstall.ps1

@@ -33,4 +33,4 @@ if ($key.Count -eq 1) {
     Write-Warning "Too many matching packages found! Package may not be uninstalled."
     Write-Warning "Please alert package maintainer the following packages were matched:"
     $key | % {Write-Warning "- $_"}
-}
+}