USBHost: removed wrong init() calls

USBHost used to have an init() method that now is incorporated in
Init(). The leftover init() calls in the library were calling
the init() function in the variant files instead (that has nothing
to do with the USBHost library).

Removing the calls to init() fix it.

Fix arduino#115

Author: cmaglie

CHANGELOG

@@ -5,6 +5,7 @@ SAMD CORE 1.6.4
 * USBHost: fixed blocking USBHost.Task(). Thanks @bbx10
 * USBHost: fixed some ASCII Control codes in keyboard controller. Thanks @bbx10
 * USBHost: ported some minor fix from upstream UHS2. Thanks @bbx10
+* USBHost: fixed wrong library initialization. Thanks @bbx10 @ladyada
 
 SAMD CORE 1.6.3 2016.02.15
 

libraries/USBHost/src/Usb.cpp

@@ -36,7 +36,6 @@ USBHost::USBHost() : bmHubPre(0) {
 uint32_t USBHost::Init() {
 	//devConfigIndex	= 0;
 	// Init host stack
-	init();
 	bmHubPre		= 0;
 	UHD_Init();
 	return 0;
@@ -507,7 +506,6 @@ void USBHost::Task(void) //USB state machine
 
 			// Init USB stack and driver
 			UHD_Init();
-			init();
 
 			// Free all USB resources
 			for (uint32_t i = 0; i < USB_NUMDEVICES; ++i)