fix build errors on esp32 v2.x

Author: brentru

src/arduino/hid/Adafruit_USBD_HID.cpp

@@ -39,7 +39,6 @@ static Adafruit_USBD_HID *_hid_dev = NULL;
 #ifdef ARDUINO_ARCH_ESP32
 static uint16_t hid_load_descriptor(uint8_t *dst, uint8_t *itf) {
   // uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB HID");
-  uint8_t str_index = 0;
 
   TU_VERIFY(_hid_dev);
 

src/arduino/midi/Adafruit_USBD_MIDI.cpp

@@ -41,7 +41,6 @@ static Adafruit_USBD_MIDI *_midi_dev = NULL;
 #ifdef ARDUINO_ARCH_ESP32
 static uint16_t midi_load_descriptor(uint8_t *dst, uint8_t *itf) {
   // uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB HID");
-  uint8_t str_index = 0;
 
   uint8_t ep_in = tinyusb_get_free_in_endpoint();
   uint8_t ep_out = tinyusb_get_free_out_endpoint();

src/arduino/webusb/Adafruit_USBD_WebUSB.cpp

@@ -124,7 +124,6 @@ TU_VERIFY_STATIC(sizeof(desc_ms_os_20) == MS_OS_20_DESC_LEN, "Incorrect size");
 #ifdef ARDUINO_ARCH_ESP32
 static uint16_t webusb_load_descriptor(uint8_t *dst, uint8_t *itf) {
   // uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB MSC");
-  uint8_t str_index = 0;
 
   uint8_t ep_in = tinyusb_get_free_in_endpoint();
   uint8_t ep_out = tinyusb_get_free_out_endpoint();