Don't override JRuby for Asciidoctor Maven plugin

We stick to the one from the plugin, because overriding
brings more problem than it could solve, new versions
JRuby break the build regularly.

Author: acogoluegnes

pom.xml

@@ -88,7 +88,6 @@
     <asciidoctorj.pdf.version>2.3.3</asciidoctorj.pdf.version>
     <asciidoctorj.diagram.version>2.2.3</asciidoctorj.diagram.version>
     <buildnumber.plugin.version>1.4</buildnumber.plugin.version>
-    <jruby.version>9.3.4.0</jruby.version>
     <jmh.version>1.36</jmh.version>
     <spotless.version>2.27.2</spotless.version>
     <google-java-format.version>1.15.0</google-java-format.version>
@@ -384,11 +383,6 @@
         <artifactId>asciidoctor-maven-plugin</artifactId>
         <version>${asciidoctor.maven.plugin.version}</version>
         <dependencies>
-          <dependency>
-            <groupId>org.jruby</groupId>
-            <artifactId>jruby-complete</artifactId>
-            <version>${jruby.version}</version>
-          </dependency>
           <dependency>
             <groupId>org.asciidoctor</groupId>
             <artifactId>asciidoctorj</artifactId>