Remove empty HID_::begin method

Proposal to simplify the implementation by removing dead code.

Author: forderud

src/HID/HID.cpp

@@ -274,9 +274,4 @@ HID_::HID_(void) : PluggableUSBModule(2, 1, epType),
 	PluggableUSB().plug(this);
 }
 
-int HID_::begin(void)
-{
-	return 0;
-}
-
 #endif /* if defined(USBCON) */

src/HID/HID.h

@@ -114,7 +114,6 @@ class HID_ : public PluggableUSBModule
 {
 public:
     HID_(void);
-    int begin(void);
     int SendReport(uint16_t id, const void* data, int len);
     int SetFeature(uint16_t id, const void* data, int len);
     bool LockFeature(uint16_t id, bool lock);

src/HIDPowerDevice.cpp

@@ -229,8 +229,6 @@ HIDPowerDevice_::HIDPowerDevice_(void) {
 }
 
 void HIDPowerDevice_::begin(void) {
-    HID().begin();
-    
     // set string ID here
 
     HID().SetFeature(HID_PD_IPRODUCT, &bProduct, sizeof(bProduct));