ci: remove unnecessary build artifact upload step

Remove the upload-artifacts step from the CI workflow as it was
not being utilized and adds unnecessary complexity to the pipeline.

.github/workflows/ci.yml

@@ -125,16 +125,6 @@ jobs:
               env:
                   NODE_ENV: production
 
-            - name: Upload build artifacts
-              uses: actions/upload-artifact@v4
-              with:
-                  name: next-build
-                  path: |
-                      .next/
-                      out/
-                  retention-days: 7
-                  if-no-files-found: warn
-
     # Security scanning
     security:
         name: Security Scan