mimxrt/mphalport: Remove redundant NVIC/IRQ defines.

These are already defined in `irq.h`. Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Author: iabdalkader

ports/mimxrt/mphalport.h

@@ -41,9 +41,6 @@
 
 // For regular code that wants to prevent "background tasks" from running.
 // These background tasks (LWIP, Bluetooth) run in PENDSV context.
-// TODO: Check for the settings of the STM32 port in irq.h
-#define NVIC_PRIORITYGROUP_4 ((uint32_t)0x00000003)
-#define IRQ_PRI_PENDSV NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 15, 0)
 #define MICROPY_PY_PENDSV_ENTER uint32_t atomic_state = raise_irq_pri(IRQ_PRI_PENDSV);
 #define MICROPY_PY_PENDSV_REENTER atomic_state = raise_irq_pri(IRQ_PRI_PENDSV);
 #define MICROPY_PY_PENDSV_EXIT restore_irq_pri(atomic_state);