Cleanup

Author: sh123

codec2talkie/src/main/java/com/radio/codec2talkie/settings/PreferenceKeys.java

@@ -9,9 +9,6 @@ public final class PreferenceKeys {
     public static String PORTS_USB_PARITY = "ports_usb_parity";
     public static String PORTS_USB_DTR = "ports_usb_dtr";
     public static String PORTS_USB_RTS = "ports_usb_rts";
-    public static String PORTS_USB_IS_PREFIX_ENABLED = "ports_usb_is_prefix_enabled";
-    public static String PORTS_USB_PREFIX = "ports_usb_prefix";
-
     public static String PORTS_BT_CLIENT_NAME = "ports_bt_client_name";
 
     public static String PORTS_TCP_IP_ADDRESS = "ports_tcp_ip_address";