Remove deprecated eslint config from next.config.js

**Motivations:**
- Fix Next.js 16.1.1 warning about unsupported eslint configuration
- Remove deprecated eslint option from next.config.js

**Root causes:**
- Next.js 16+ no longer supports eslint configuration in next.config.js
- The eslint option has been moved to command-line options or .eslintrc.json

**Correctifs:**
- Removed eslint configuration block from next.config.js
- Added comment explaining the change and alternatives

**Evolutions:**
- None

**Pages affectées:**
- next.config.js

next.config.js

@@ -1,11 +1,8 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   reactStrictMode: true,
-  eslint: {
-    // Désactiver ESLint lors du build pour permettre le déploiement
-    // Les erreurs doivent être corrigées mais n'empêchent pas le build
-    ignoreDuringBuilds: true,
-  },
+  // Note: eslint configuration in next.config.js is no longer supported in Next.js 16+
+  // Use 'next lint --ignore-build-errors' or configure in .eslintrc.json instead
   typescript: {
     // Désactiver la vérification TypeScript lors du build
     ignoreBuildErrors: true,