Remove commented out code

Author: felser

targets/TARGET_STM/TARGET_STM32L4/TARGET_MTS_DRAGONFLY_L471QG/objects.h

@@ -54,23 +54,6 @@ struct port_s {
     __IO uint32_t *reg_out;
 };
 
-//struct analogin_s {
-//    ADCName adc;
-//    PinName pin;
-//    uint32_t channel;
-//};
-//
-//struct dac_s {
-//    DACName dac;
-//    PinName pin;
-//    uint32_t channel;
-//};
-//
-//struct can_s {
-//    CANName can;
-//    int index;
-//};
-
 struct trng_s {
     RNG_HandleTypeDef handle;
 };