[kernel] remove cpuport from rtdef.h and rtthread.h

include/rtdef.h

@@ -200,8 +200,6 @@ typedef rt_base_t                       rt_off_t;       /**< Type for offset */
     #error not supported tool chain
 #endif
 
-#include <cpuport.h>
-
 /* initialization export */
 #ifdef RT_USING_COMPONENTS_INIT
 typedef int (*init_fn_t)(void);

include/rtthread.h

@@ -22,7 +22,6 @@
 #include <rtconfig.h>
 #include <rtdebug.h>
 #include <rtdef.h>
-#include <cpuport.h>
 #include <rtservice.h>
 #include <rtm.h>