doc: remove old reference to nanokernel in API doc

API comment for k_sem_take included an obsolete note about
porting from the legacy nanokernel interface.

Signed-off-by: David B. Kinder <[email protected]>

Author: dbkinder

include/kernel.h

@@ -3375,12 +3375,6 @@ __syscall void k_sem_init(struct k_sem *sem, unsigned int initial_count,
  *                milliseconds), or one of the special values K_NO_WAIT and
  *                K_FOREVER.
  *
- * @note When porting code from the nanokernel legacy API to the new API, be
- * careful with the return value of this function. The return value is the
- * reverse of the one of nano_sem_take family of APIs: 0 means success, and
- * non-zero means failure, while the nano_sem_take family returns 1 for success
- * and 0 for failure.
- *
  * @retval 0 Semaphore taken.
  * @retval -EBUSY Returned without waiting.
  * @retval -EAGAIN Waiting period timed out.