title: how to disable warning for niogroovymethods
body: <p>I am using groovy-2.3.3, with jdk6u35. The groovy binaries have been extracted from groovy-sdk-2.3.3.zip.</p>
  
  <p>After compiling with groovyc, I got an error while running java:</p>
  
  <pre><code>Unsupported major.minor version 51.0.
  </code></pre>
  
  <p>I googled and figured that the problem was with the groovy-all-2.3.3-indy.jar (which is used for jdk7+), so I removed it from my CLASSPATH. Now the program works, but it gives a warning:</p>
  
  <pre><code>WARNING: Module [groovy-all] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]
  </code></pre>
  
  <p>How to disable this warning message, since I know that it is not applicable for my setup?</p>
  
  <p>If I cannot disable this warning without a recompilation from source (which is not a valid option for me), is there any other groovy executable that I should download, instead of the sdk zip file, so that it can work with java-jdk6 without any warnings?</p>