Remove proxy support in vite server (#6359)

- Does not support OPTIONS requests
- No point keeping it around

src/frontend/vite.config.ts

@@ -23,23 +23,6 @@ export default defineConfig({
     outDir: '../../InvenTree/web/static/web'
   },
   server: {
-    proxy: {
-      '/api': {
-        target: 'http://localhost:8000',
-        changeOrigin: true,
-        secure: true
-      },
-      '/media': {
-        target: 'http://localhost:8000',
-        changeOrigin: true,
-        secure: true
-      },
-      '/static': {
-        target: 'http://localhost:8000',
-        changeOrigin: true,
-        secure: true
-      }
-    },
     watch: {
       // use polling only for WSL as the file system doesn't trigger notifications for Linux apps
       // ref: https://github.com/vitejs/vite/issues/1153#issuecomment-785467271