Don't include assert.h from public header file

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

sched/semaphore/sem_clockwait.c

@@ -27,6 +27,7 @@
 #include <stdint.h>
 #include <unistd.h>
 #include <time.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 

sched/semaphore/sem_recover.c

@@ -24,6 +24,8 @@
 
 #include <nuttx/config.h>
 
+#include <assert.h>
+
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
 #include <nuttx/sched.h>

sched/semaphore/sem_tickwait.c

@@ -27,6 +27,7 @@
 #include <stdint.h>
 #include <unistd.h>
 #include <time.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 

sched/semaphore/sem_timedwait.c

@@ -22,6 +22,8 @@
  * Included Files
  ****************************************************************************/
 
+#include <assert.h>
+
 #include <nuttx/semaphore.h>
 
 /****************************************************************************

sched/semaphore/sem_trywait.c

@@ -26,6 +26,7 @@
 
 #include <stdbool.h>
 #include <sched.h>
+#include <assert.h>
 #include <errno.h>
 
 #include <nuttx/irq.h>

sched/semaphore/sem_waitirq.c

@@ -25,6 +25,7 @@
 #include <nuttx/config.h>
 
 #include <sched.h>
+#include <assert.h>
 #include <errno.h>
 
 #include <nuttx/irq.h>