CI: Remove buildspec usage from Windows builds

Author: PatTheMav

.github/scripts/Build-Windows.ps1

@@ -36,7 +36,6 @@ function Build {
 
     $ScriptHome = $PSScriptRoot
     $ProjectRoot = Resolve-Path -Path "$PSScriptRoot/../.."
-    $BuildSpecFile = "${ProjectRoot}/buildspec.json"
 
     $UtilityFunctions = Get-ChildItem -Path $PSScriptRoot/utils.pwsh/*.ps1 -Recurse
 
@@ -45,8 +44,6 @@ function Build {
         . $Utility.FullName
     }
 
-    $BuildSpec = Get-Content -Path ${BuildSpecFile} -Raw | ConvertFrom-Json
-
     Install-BuildDependencies -WingetFile "${ScriptHome}/.Wingetfile"
 
     Push-Location -Stack BuildTemp

.github/scripts/Package-Windows.ps1

@@ -34,7 +34,6 @@ function Package {
 
     $ScriptHome = $PSScriptRoot
     $ProjectRoot = Resolve-Path -Path "$PSScriptRoot/../.."
-    $BuildSpecFile = "${ProjectRoot}/buildspec.json"
 
     $UtilityFunctions = Get-ChildItem -Path $PSScriptRoot/utils.pwsh/*.ps1 -Recurse