stmhal: Comment out unused functions.

stmhal/pin_named_pins.c

@@ -64,6 +64,7 @@ const pin_obj_t *pin_find_named_pin(const mp_obj_dict_t *named_pins, mp_obj_t na
     return NULL;
 }
 
+/* unused
 const pin_af_obj_t *pin_find_af(const pin_obj_t *pin, uint8_t fn, uint8_t unit, uint8_t type) {
     const pin_af_obj_t *af = pin->af;
     for (mp_uint_t i = 0; i < pin->num_af; i++, af++) {
@@ -73,6 +74,7 @@ const pin_af_obj_t *pin_find_af(const pin_obj_t *pin, uint8_t fn, uint8_t unit,
     }
     return NULL;
 }
+*/
 
 const pin_af_obj_t *pin_find_af_by_index(const pin_obj_t *pin, mp_uint_t af_idx) {
     const pin_af_obj_t *af = pin->af;
@@ -84,6 +86,7 @@ const pin_af_obj_t *pin_find_af_by_index(const pin_obj_t *pin, mp_uint_t af_idx)
     return NULL;
 }
 
+/* unused
 const pin_af_obj_t *pin_find_af_by_name(const pin_obj_t *pin, const char *name) {
     const pin_af_obj_t *af = pin->af;
     for (mp_uint_t i = 0; i < pin->num_af; i++, af++) {
@@ -93,3 +96,4 @@ const pin_af_obj_t *pin_find_af_by_name(const pin_obj_t *pin, const char *name)
     }
     return NULL;
 }
+*/