Remove obsolete PR merge and checkout scripts

do_checkout_pr49.ps1

@@ -1,12 +0,0 @@
-# Check out PR #49 locally
-# Run: powershell -ExecutionPolicy Bypass -File do_checkout_pr49.ps1
-
-Set-Location "d:\USERFILES\GitHub\ComfyUI-QwenImageLoraLoader"
-
-# Remove stale index lock if present
-if (Test-Path ".git\index.lock") {
-    Remove-Item ".git\index.lock" -Force
-}
-
-# Check out branch pr-49
-git checkout pr-49

do_merge_pr49.ps1

@@ -1,12 +0,0 @@
-# PR #49 merge on GitHub (Squash and merge)
-# Disable proxy to avoid 127.0.0.1 connection
-
-$env:HTTP_PROXY = ""
-$env:HTTPS_PROXY = ""
-$env:http_proxy = ""
-$env:https_proxy = ""
-$env:ALL_PROXY = ""
-$env:NO_PROXY = "*"
-
-Set-Location $PSScriptRoot
-gh pr merge 49 --squash