[components/ktime]: Remove unused rt_ktime_cputimer_getstep

Can use rt_ktime_cputimer_getfrq() / RT_TICK_PER_SECOND instead.

components/drivers/ktime/inc/ktime.h

@@ -79,13 +79,6 @@ unsigned long rt_ktime_cputimer_getfrq(void);
  */
 unsigned long rt_ktime_cputimer_getcnt(void);
 
-/**
- * @brief Get cputimer the cnt value corresponding to 1 os tick
- *
- * @return step
- */
-unsigned long rt_ktime_cputimer_getstep(void);
-
 /**
  * @brief Init cputimer
  *

components/drivers/ktime/src/aarch64/cputimer.c

@@ -28,11 +28,6 @@ unsigned long rt_ktime_cputimer_getcnt(void)
     return rt_hw_get_cntpct_val() - _init_cnt;
 }
 
-unsigned long rt_ktime_cputimer_getstep(void)
-{
-    return rt_ktime_cputimer_getfrq() / RT_TICK_PER_SECOND;
-}
-
 void rt_ktime_cputimer_init(void)
 {
     _init_cnt = rt_hw_get_cntpct_val();

components/drivers/ktime/src/cputimer.c

@@ -25,11 +25,6 @@ rt_weak unsigned long rt_ktime_cputimer_getcnt(void)
     return rt_tick_get();
 }
 
-rt_weak unsigned long rt_ktime_cputimer_getstep(void)
-{
-    return 1;
-}
-
 rt_weak void rt_ktime_cputimer_init(void)
 {
     return;

components/drivers/ktime/src/risc-v/virt64/cputimer.c

@@ -29,11 +29,6 @@ unsigned long rt_ktime_cputimer_getcnt(void)
     return time_elapsed - _init_cnt;
 }
 
-unsigned long rt_ktime_cputimer_getstep(void)
-{
-    return rt_ktime_cputimer_getfrq() / RT_TICK_PER_SECOND;
-}
-
 void rt_ktime_cputimer_init(void)
 {
     __asm__ __volatile__("rdtime %0" : "=r"(_init_cnt));