removing '-debug' command line parameter for grid hub, it isn't used …

…anywhere.

adding fine tuned logging should be done via java logging mechanisms.

java/server/src/org/openqa/grid/internal/utils/GridHubConfiguration.java

@@ -106,10 +106,6 @@ public class GridHubConfiguration {
    * max number of thread for Jetty. Default is normally 255.
    */
   private int jettyMaxThreads = -1;
-  /**
-   * to specify that logging level should be set to Level.DEBUG
-   */
-  private boolean isDebug = false;
 
   private Map<String, Object> allParams = new HashMap<>();
 
@@ -219,10 +215,6 @@ public void loadFromCommandLine(String[] args) {
     if (helper.isParamPresent("-log")) {
       logFilename = helper.getParamValue("-log");
     }
-    if (helper.isParamPresent("-debug")) {
-      isDebug = true;
-    }
-
   }
 
   /**
@@ -383,10 +375,6 @@ public String getLogFilename() {
     return logFilename;
   }
 
-  public boolean isDebug() {
-    return isDebug;
-  }
-
   public Map<String, String> getGrid1Mapping() {
     return grid1Mapping;
   }