Remove Cloudflare, Netlify, and Vercel templates (#161)

* Update README with links to vendor deployment guides

* Remove old template tests

* Remove vendor templates

Author: brookslybrand

.tests/test.cloudflare-d1.ts

@@ -68,37 +68,15 @@ Adds PostgreSQL database support with DrizzleORM to the default template, includ
 npx create-react-router@latest --template remix-run/react-router-templates/node-postgres
 ```
 
-**Cloudflare template:**
+### Deployment Guides
 
-Optimized for Cloudflare's edge platform with built-in deployment workflows using Wrangler CLI. Includes preview deployments and progressive rollouts.
+Many vendors maintain their own templates for React Router. The following are popular deployment platforms with their own templates and deployment guides:
 
-```bash
-npx create-react-router@latest --template remix-run/react-router-templates/cloudflare
-```
-
-**Cloudflare with D1 template:**
-
-Extends the Cloudflare template with D1 database support, including migrations and production database setup. Perfect for edge-first applications with persistent data.
-
-```bash
-npx create-react-router@latest --template remix-run/react-router-templates/cloudflare-d1
-```
-
-**Vercel template:**
+- [**Cloudflare Guide**](https://developers.cloudflare.com/workers/framework-guides/web-apps/react-router/)
 
-Pre-configured for Vercel deployment with optimized serverless functions and edge caching. Includes one-click deployment to Vercel's platform.
+- [**Netlify Guide**](https://docs.netlify.com/build/frameworks/framework-setup-guides/react-router/)
 
-```bash
-npx create-react-router@latest --template remix-run/react-router-templates/vercel
-```
-
-**Netlify template:**
-
-Ready for Netlify deployment with serverless functions and edge caching. Features one-click deployment to Netlify's platform.
-
-```bash
-npx create-react-router@latest --template remix-run/react-router-templates/netlify
-```
+- [**Vercel Guide**](https://vercel.com/templates/react-router/react-router-boilerplate)
 
 ### Community Templates
 
@@ -117,5 +95,4 @@ If you have a template you have developed and maintain, please submit a PR to ad
 - [React Router with Mantine](https://github.com/samui-build/react-router-mantine) - React Router 7 default template but with [Mantine](https://mantine.dev) instead of TailwindCSS.
 
 - [VITE-SHADCN](https://github.com/yluiop123/vite-shadcn) - a Shadcn Admin UI built with React Router 7 and Shadcn, Vite, React, Zustand.
-  
 - [React Router with Material UI](https://github.com/mui/material-ui/tree/master/examples/material-ui-react-router-ts) - React Router 7 with [Material UI 7](https://mui.com/material-ui/getting-started/).