Remove consumer Ruby setup

Author: neilvcarvalho

action.yml

@@ -40,13 +40,7 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - name: Set up Ruby (consumer)
-      uses: ruby/setup-ruby@v1
-      with:
-        bundler-cache: true
-        ruby-version: ${{ inputs.ruby-version }}
-
-    - name: Set up Ruby (action)
+    - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -56,7 +50,6 @@ runs:
       shell: bash
       working-directory: ${{ inputs.working-directory }}
       env:
-        BUNDLE_GEMFILE:           ${{ github.action_path }}/Gemfile
         GITHUB_TOKEN:             ${{ inputs.github-token }}
         GITHUB_REPOSITORY:        ${{ github.repository }}
         INPUT_CONFIG_FILE:        ${{ inputs.config-file }}

exe/importmap-update

@@ -162,11 +162,6 @@ when :run
     exit 2
   end
 
-  # Unset BUNDLE_GEMFILE for all child processes (bin/importmap, git, …).
-  # The action is invoked with BUNDLE_GEMFILE pointing at its own Gemfile so
-  # that `bundle exec` loads octokit; if that leaks into bin/importmap the
-  # Rails app's boot.rb will try to use the action's Gemfile instead of its
-  # own, which doesn't have Rails.
   runner = Importmap::Update::Commands::ShellRunner.new
   gh = Importmap::Update::GitHubClient.new(repo: repo, token: token)
   git = Importmap::Update::GitClient.new(