Removed lcd.init()

Redundant code.
Might confuse novice programmers.
:)

examples/HelloWorld/HelloWorld.pde

@@ -9,7 +9,6 @@ LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars
 void setup()
 {
   lcd.init();                      // initialize the lcd 
-  lcd.init();
   // Print a message to the LCD.
   lcd.backlight();
   lcd.setCursor(3,0);