complete remove dcd_set_config(), fix unit test

src/portable/valentyusb/eptri/dcd_eptri.c

@@ -383,14 +383,6 @@ void dcd_set_address(uint8_t rhport, uint8_t dev_addr)
   usb_address_write(dev_addr);
 }
 
-// Called when the device received SET_CONFIG request, you can leave this
-// empty if your peripheral does not require any specific action.
-void dcd_set_config(uint8_t rhport, uint8_t config_num)
-{
-  (void) rhport;
-  (void) config_num;
-}
-
 // Called to remote wake up host when suspended (e.g hid keyboard)
 void dcd_remote_wakeup(uint8_t rhport)
 {