Remove debug flag (fix #47)

src/org/traccar/client/TraccarActivity.java

@@ -42,7 +42,6 @@ public class TraccarActivity extends PreferenceActivity {
     public static final String KEY_PORT = "port";
     public static final String KEY_INTERVAL = "interval";
     public static final String KEY_PROVIDER = "provider";
-    public static final String KEY_DEBUG = "debug";
     public static final String KEY_STATUS = "status";
 
     @Override