[release-1.9] [RHDHBUGS-1978]: Remove broken tech-radar proxy example from learning paths (#2145)

Co-authored-by: Fabrice Flore-Thébault <ffloreth@redhat.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

modules/shared/proc-customize-the-learning-paths-by-using-a-hosted-json-file.adoc

@@ -41,7 +41,6 @@ proxy:
       target: https://raw.githubusercontent.com/
       pathRewrite:
         '^/api/proxy/developer-hub/learning-paths': '/redhat-developer/rhdh/main/packages/app/public/learning-paths/data.json'
-        '^/api/proxy/developer-hub/tech-radar': '/redhat-developer/rhdh/main/packages/app/public/tech-radar/data-default.json'
         '^/api/proxy/developer-hub': '/redhat-developer/rhdh/main/packages/app/public/homepage/data.json'
       changeOrigin: true
       secure: true