Clear windows branch; preserve previous contents in win-old

scripts/windows/prepare-zluda-source.ps1

@@ -1,25 +0,0 @@
-[CmdletBinding()]
-param([string]$SourceRoot)
-$ErrorActionPreference = 'Stop'
-$repo = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '../..'))
-if (!$SourceRoot) { $SourceRoot = Join-Path $repo 'external/ZLUDA' }
-$SourceRoot = [IO.Path]::GetFullPath($SourceRoot)
-$base = 'ee2f25a180099fa42f36b2346732e1f2470a03ad'
-if (!(Test-Path (Join-Path $SourceRoot 'Cargo.toml'))) { throw 'Clone upstream ZLUDA into external/ZLUDA first.' }
-Push-Location $SourceRoot
-try {
-    $revision = (& git rev-parse HEAD).Trim()
-    if ($revision -ne $base) { throw "Expected ZLUDA $base, found $revision; review patches against the new revision." }
-    $dirty = @(& git status --porcelain --untracked-files=no --ignore-submodules=all)
-    if ($dirty.Count) { throw 'ZLUDA source has tracked modifications. Keep this prepared checkout; do not reapply patches.' }
-    & git switch -c windows-rdna4
-    if ($LASTEXITCODE) { throw 'Could not create the local ZLUDA branch.' }
-    foreach ($patch in (Get-ChildItem -LiteralPath (Join-Path $repo 'patches/zluda') -Filter '*.patch' | Sort-Object Name)) {
-        & git apply --check $patch.FullName
-        if ($LASTEXITCODE) { throw "Patch check failed: $($patch.Name)" }
-        & git apply --whitespace=nowarn $patch.FullName
-        if ($LASTEXITCODE) { throw "Patch failed: $($patch.Name)" }
-        Write-Host "Applied $($patch.Name)"
-    }
-    Write-Host "Prepared Windows ZLUDA source at $SourceRoot (base $base)"
-} finally { Pop-Location }