[PATCH] hrtimer: remove unused clock constants

#define CLOCK_MONOTONIC	  	 1

#define CLOCK_PROCESS_CPUTIME_ID 2

#define CLOCK_THREAD_CPUTIME_ID	 3

#define CLOCK_REALTIME_HR	 4

#define CLOCK_MONOTONIC_HR	  5

/*

 * The IDs of various hardware clocks

#define CLOCK_SGI_CYCLE 10

#define MAX_CLOCKS 16

#define CLOCKS_MASK  (CLOCK_REALTIME | CLOCK_MONOTONIC | \

                     CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR)

#define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR)

#define CLOCKS_MASK  (CLOCK_REALTIME | CLOCK_MONOTONIC)

#define CLOCKS_MONO (CLOCK_MONOTONIC)

/*

 * The various flags for setting POSIX.1b interval timers.