Backport: chore(provider/gateway): update gateway model settings files (#13174)

This is an automated backport of #13169 to the release-v6.0 branch. FYI
@vercel-ai-sdk[bot]

Co-authored-by: vercel-ai-sdk[bot] <225926702+vercel-ai-sdk[bot]@users.noreply.github.com>

Author: vercel-ai-sdk[bot]

.changeset/psncj-ecfys-yryon.md

@@ -0,0 +1,5 @@
+---
+'@ai-sdk/gateway': patch
+---
+
+chore(provider/gateway): update gateway model settings files

packages/gateway/src/gateway-language-model-settings.ts

@@ -129,12 +129,10 @@ export type GatewayModelId =
   | 'openai/gpt-5.2-chat'
   | 'openai/gpt-5.2-codex'
   | 'openai/gpt-5.2-pro'
-  | 'openai/gpt-5.4'
-  | 'openai/gpt-5.4-2026-03-05'
-  | 'openai/gpt-5.4-pro'
-  | 'openai/gpt-5.4-pro-2026-03-05'
   | 'openai/gpt-5.3-chat'
   | 'openai/gpt-5.3-codex'
+  | 'openai/gpt-5.4'
+  | 'openai/gpt-5.4-pro'
   | 'openai/gpt-oss-120b'
   | 'openai/gpt-oss-20b'
   | 'openai/gpt-oss-safeguard-20b'