Remove RubyGems.org publish step — GPR only

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: architecture

.github/workflows/gem-push.yml

@@ -34,13 +34,3 @@ jobs:
         GEM_HOST_API_KEY: "Bearer ${{secrets.GITHUB_TOKEN}}"
         OWNER: ${{ github.repository_owner }}
 
-    - name: Publish to RubyGems
-      run: |
-        mkdir -p $HOME/.gem
-        touch $HOME/.gem/credentials
-        chmod 0600 $HOME/.gem/credentials
-        printf -- "---\n:rubygems_api_key: ${GEM_HOST_API_KEY}\n" > $HOME/.gem/credentials
-        gem build *.gemspec
-        gem push elevenlabs-*.gem
-      env:
-        GEM_HOST_API_KEY: "${{secrets.RUBYGEMS_AUTH_TOKEN}}"