refactor: drop legacy netlify templates from CLI (#4833)

Remix will no longer be used for netlify. And less choice for user. Now
we have only netlify and ssg netlify templates.

<img width="374" alt="image"
src="https://github.com/user-attachments/assets/29d68ee9-afee-42a8-8e0b-90ffa7bb52de"
/>

Author: TrySound

.github/workflows/main.yml

@@ -134,7 +134,7 @@ jobs:
             }
             const results = [
               await assertSize('./fixtures/ssg/dist/client', 352),
-              await assertSize('./fixtures/webstudio-remix-netlify-functions/build/client', 440),
+              await assertSize('./fixtures/react-router-netlify/build/client', 360),
               await assertSize('./fixtures/webstudio-features/build/client', 926),
             ]
             for (const result of results) {