Revert "templates and build step for validating/submitting winget package" (#6696)

Reverts openai/codex#6485

.github/winget_templates/OpenAI.Codex.installer.yaml

@@ -1,17 +0,0 @@
-PackageIdentifier: OpenAI.Codex
-PackageVersion: {{VERSION}}
-Installers:
-  - Architecture: x64
-    InstallerType: portable
-    InstallerUrl: https://github.com/openai/codex/releases/download/rust-v{{VERSION}}/codex-x86_64-pc-windows-msvc.exe
-    InstallerSha256: {{X64_SHA256}}
-    Commands:
-      - codex
-  - Architecture: arm64
-    InstallerType: portable
-    InstallerUrl: https://github.com/openai/codex/releases/download/rust-v{{VERSION}}/codex-aarch64-pc-windows-msvc.exe
-    InstallerSha256: {{ARM64_SHA256}}
-    Commands:
-      - codex
-ManifestType: installer
-ManifestVersion: 1.5.0