homebrew testing uses system ruby

.github/workflows/main.yml

@@ -121,10 +121,6 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ env.DEFAULT_RUBY_VERSION }}
-        bundler-cache: true
     - run: ./dev/ci/setup-host homebrew-packaging
     - run: ./dev/ci/run-tests-natively homebrew-packaging
     - uses: actions/upload-artifact@v4

dev/ci/tests/homebrew-packaging/setup

@@ -1,14 +1,13 @@
 #!/usr/bin/env bash
 set -e
 
-if ! rvm-exec system gem list | grep -qE '^rack '; then
+if ! gem list | grep -qE '^rack '; then
 	# The native packaging test runs passenger-install-*-module with the system Ruby,
 	# which in turn requires the 'rack' gem to be installed in the system Ruby's
 	# default RubyGems path. 'rake test:install_deps' installs to a local bundler
 	# directory but not to the default RubyGems path.
-	export rvmsudo_secure_path=0
-	retry_run 3 rvmsudo rvm-exec system gem install rack --no-document
+	retry_run 3 sudo system gem install rack --no-document
 fi
-retry_run 3 rvm-exec system rake test:install_deps DEVDEPS_DEFAULT=no BASE_DEPS=yes SUDO=yes
-retry_run 3 gem install bundler -v 1.17.2 --no-document
+retry_run 3 rake test:install_deps DEVDEPS_DEFAULT=no BASE_DEPS=yes SUDO=yes
+retry_run 3 gem install bundler -v '~>1.0' --no-document
 retry_run 3 rake test:install_deps BASE_DEPS=yes