Don't check and write protect the system firmware on boot

There is a possibility that in low power / unreliable power situations that checking if the system firmware flash pages are write protected will give the wrong result. The system firmware would attempt to write protect the system firmware flash pages, which erases the option bytes and if the device resets at that moment, sets the write protection level 1.

A similar change was made to the bootloader in #1578

hal/src/stm32f2xx/core_hal_stm32f2xx.c

@@ -383,11 +383,6 @@ void HAL_Core_Config(void)
     // fully intialize the RTOS.
     HAL_Core_Setup_override_interrupts();
 
-#if defined(MODULAR_FIRMWARE) && MODULAR_FIRMWARE
-    // write protect system module parts if not already protected
-    FLASH_WriteProtectMemory(FLASH_INTERNAL, CORE_FW_ADDRESS, USER_FIRMWARE_IMAGE_LOCATION - CORE_FW_ADDRESS, true);
-#endif /* defined(MODULAR_FIRMWARE) && MODULAR_FIRMWARE */
-
 #ifdef HAS_SERIAL_FLASH
     //Initialize Serial Flash
     sFLASH_Init();