check if this is still needed

Author: tagliala

.github/workflows/ruby.yml

@@ -18,12 +18,6 @@ jobs:
         ruby-version: ['3.1', '3.2', '3.3', '3.4', 'jruby-9.4', 'jruby-10.0']
 
     steps:
-    - name: Set up Java for JRuby 10.0
-      if: matrix.ruby-version == 'jruby-10.0'
-      uses: actions/setup-java@v5
-      with:
-        distribution: 'temurin'
-        java-version: '21'
     - uses: actions/checkout@v5
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1