minor: revert inadvertent commit

SVN: 22019

screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/server/dataaccess/WellContentQueryResult.java

@@ -55,10 +55,4 @@ public class WellContentQueryResult extends ExperimentReferenceQueryResult
 
     @Deprecated
     public String material_content_type_code;
-
-    public static void main(String[] args)
-    {
-        System.out.println(IScreeningQuery.WELLS_FOR_MATERIAL_ID_SELECT);
-    }
-
 }