score, ptrace: remove unused macros

'COUNTER' and other same kind macros are too common to use, and easy to
get conflict with other modules.

At present, they are not used, so it is OK to simply remove them. And
the related warning (allmodconfig with score):

CC [M] drivers/md/raid1.o
In file included from drivers/md/raid1.c:42:0:
drivers/md/bitmap.h:93:0: warning: "COUNTER" redefined
#define COUNTER(x) (((bitmap_counter_t) x) & COUNTER_MAX)
^
In file included from ./arch/score/include/asm/ptrace.h:4:0,
from include/linux/sched.h:31,
from include/linux/blkdev.h:4,
from drivers/md/raid1.c:36:
./arch/score/include/uapi/asm/ptrace.h:13:0: note: this is the location of the previous definition
#define COUNTER 38

Signed-off-by: Chen Gang <[e-mail]>
Signed-off-by: David Rientjes <[e-mail]>
Cc: Lennox Wu <[e-mail]>
Cc: Guenter Roeck <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/score/include/uapi/asm/ptrace.h

···
 #define PTRACE_GETREGS		12
 #define PTRACE_SETREGS		13
 
-#define PC		32
-#define CONDITION	33
-#define ECR		34
-#define EMA		35
-#define CEH		36
-#define CEL		37
-#define COUNTER		38
-#define LDCR		39
-#define STCR		40
-#define PSR		41
-
 #define SINGLESTEP16_INSN	0x7006
 #define SINGLESTEP32_INSN	0x840C8000
 #define BREAKPOINT16_INSN	0x7002		/* work on SPG300 */