remove AUTHORS file

AUTHORS

@@ -1,45 +0,0 @@
-Kernel Design & Implementation
-- Bernard Xiong <bernard.xiong@gmail.com>
-
-LwIP 1.3.0/1.3.1/1.3.2/1.4.0
-- Porting
-  Qiu Yi
-  Mbbill
-- Testing
-  Bernard Xiong
-
-Filesystem
-- Porting and Add Virtual Filesystem
-- Testing
-  Qiu Yi
-  prife
-
-RTGUI
-- Design and Implemenation
-  Bernard Xiong
-  Grissiom
-
-BSP
-Bernard Xiong
-- ATMEL AT91SAM7S64 & AT91SAM7X256 Porting
-- STM32 Porting
-- S3C4510 Porting
-
-Mbbill
-- ATMEL AT91SAM7X256
-
-Xulong Cao
-- QEMU/x86
-
-Aozima
-- LPC 2148 Porting
-- STM32 Porting
-
-Jing Lee
-- LPC 2478 Porting
-
-Qiu Yi
-- S3C2410 & S3C2440 Porting
-- TI LM3S
-
-others...