ARM: imx: Remove unused chip revision strings

Since commit (167a19d2: ARM: imx: Introduce generic function for displaying silicon revision)
we no longer need the chip revision strings, so remove them.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/include/mach/mxc.h

@@ -50,20 +50,6 @@
 #define IMX_CHIP_REVISION_3_3		0x33
 #define IMX_CHIP_REVISION_UNKNOWN	0xff
 
-#define IMX_CHIP_REVISION_1_0_STRING		"1.0"
-#define IMX_CHIP_REVISION_1_1_STRING		"1.1"
-#define IMX_CHIP_REVISION_1_2_STRING		"1.2"
-#define IMX_CHIP_REVISION_1_3_STRING		"1.3"
-#define IMX_CHIP_REVISION_2_0_STRING		"2.0"
-#define IMX_CHIP_REVISION_2_1_STRING		"2.1"
-#define IMX_CHIP_REVISION_2_2_STRING		"2.2"
-#define IMX_CHIP_REVISION_2_3_STRING		"2.3"
-#define IMX_CHIP_REVISION_3_0_STRING		"3.0"
-#define IMX_CHIP_REVISION_3_1_STRING		"3.1"
-#define IMX_CHIP_REVISION_3_2_STRING		"3.2"
-#define IMX_CHIP_REVISION_3_3_STRING		"3.3"
-#define IMX_CHIP_REVISION_UNKNOWN_STRING	"unknown"
-
 #ifndef __ASSEMBLY__
 extern unsigned int __mxc_cpu_type;
 #endif