script to delete the line which is small in length and line on one another

this will take care of getting rid off the small paths

#target illustrator
// deletes pathItems smaller than the supplied length
var idoc = app.activeDocument;
var howLong = prompt ("Enter the length in points of small paths to be deleted", 10, "Delete Small Paths");
for (i=0 ; i< idoc.pathItems.length; i++)
     {
          var ipath = idoc.pathItems
               if ( ipath.length < howLong)
                    {
                         ipath.selected = true;
                    }
     }
app.redraw();
if(confirm ("Proceed to delete selected items?", "yes", "Confirm Delete"))
     {
          app.cut();
     }

What OS are you using?