Remove OpenJDK warning, OpenJDK works better than sun jre6 now...

Fixes issue 3853

Change-Id: Id57da707ee10ce17189a233a321cdd8d10a9f2f7
Reviewed-on: http://gerrit.dmdirc.com/1190
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>

src/com/dmdirc/addons/ui_swing/SwingController.java

@@ -701,15 +701,6 @@ public final class SwingController extends Plugin implements Serializable,
                     "Main frame not created. Unable to continue.");
         }
 
-        if (System.getProperty("java.vm.name", "unknown").contains("OpenJDK")
-                && IdentityManager.getGlobalConfig().getOptionBool(getDomain(),
-                "showjrewarning")) {
-            new StandardMessageDialog(me, ModalityType.MODELESS,
-                    "Unsupported JRE", "OpenJDK has known graphical "
-                    + "issues and as such is unsupported by DMDirc.  Please "
-                    + "consider using the official JRE.").display();
-        }
-
         WindowManager.addFrameListener(windowFactory);
         Main.setUI(this);
     }