The opamp driven LED on PB7 goes too, I don't think that is worth enough to bother. Actually, I am not even sure what that is the indicator for. It's marked 'L' and is a yellow LED.
That is the standard pin 13 LED made famous and standard to support the infamous Blink example sketch.
Oh, OK, it's the indicator indicator :). I think I will leave that off. I don't want to have to bother with an opamp just drive an 0805 LED on the board since I don't need the opamp for the power circuitry that I am going to leave off too.
Driving the led via a op-amp section buffer is a newer method that came upon the scene with the R3 versions of the Uno and Mega boards. Prior to that all standard arduino boards wired the series led/1K ohm resistor directly from pin 13 to ground. The on board pin 13 led can be useful as a troubleshooting tool and an indication of the bootloader running, etc. Having it is not a requirement but also it's not just blingy jewelry either. ;)
Edit: By the way this newer way of driving the led via a op-amp section in Rev3 boards is not without a flaw. Many users report the led being randomly on or off even when not being used in their sketch. As the pin will default to input mode the op-amp input is effectively seeing a 'floating input pin' condition and therefore no insurance of what state to drive the led, on or off. So to insure the led is off if you aren't using it in a sketch then one must set pin 13 mode to output and write a LOW to the pin. That's pretty poor design, they should have wired a 50k ohm pull down resistor from the opamp input to ground.