[MIPS] remove unneeded button check for reset

Removed unneeded button check for reset.
Because, the Cobalt has power switch.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/mach-cobalt/cobalt.h b/include/asm-mips/mach-cobalt/cobalt.h
index a79e7ca..5b9fce7 100644
--- a/include/asm-mips/mach-cobalt/cobalt.h
+++ b/include/asm-mips/mach-cobalt/cobalt.h
@@ -1,5 +1,5 @@
 /*
- * Lowlevel hardware stuff for the MIPS based Cobalt microservers.
+ * The Cobalt board ID information.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -12,9 +12,6 @@
 #ifndef __ASM_COBALT_H
 #define __ASM_COBALT_H
 
-/*
- * The Cobalt board ID information.
- */
 extern int cobalt_board_id;
 
 #define COBALT_BRD_ID_QUBE1    0x3
@@ -22,14 +19,4 @@
 #define COBALT_BRD_ID_QUBE2    0x5
 #define COBALT_BRD_ID_RAQ2     0x6
 
-#define COBALT_KEY_PORT		((~*(volatile unsigned int *) CKSEG1ADDR(0x1d000000) >> 24) & COBALT_KEY_MASK)
-# define COBALT_KEY_CLEAR	(1 << 1)
-# define COBALT_KEY_LEFT	(1 << 2)
-# define COBALT_KEY_UP		(1 << 3)
-# define COBALT_KEY_DOWN	(1 << 4)
-# define COBALT_KEY_RIGHT	(1 << 5)
-# define COBALT_KEY_ENTER	(1 << 6)
-# define COBALT_KEY_SELECT	(1 << 7)
-# define COBALT_KEY_MASK	0xfe
-
 #endif /* __ASM_COBALT_H */