GIGA uPython minor update

Removed leftover header and updated firmware link

Author: karlsoderby

content/hardware/10.mega/boards/giga-r1-wifi/tutorials/giga-micropython/giga-micropython.md

@@ -28,7 +28,7 @@ You will need the following software/tools installed:
 
 ## Installation
 
-**1.** Download the [GIGAR1_MP_FW.dfu](/resources/firmware/GIGAR1_MP_FW.dfu) firmware.
+**1.** Download the [GIGAR1_MP_FW.dfu](/resources/firmware/GIGAR1_MP_FW.dfu) firmware (latest firmware is always available at the [MicroPython with Arduino](/micropython/) page).
 
 **2.** Download the [dfu-util](https://dfu-util.sourceforge.net/) tool, or install via Brew (or other package managers). Make sure it is in your PATH.
 
@@ -74,8 +74,6 @@ To find out examples and more fundamental knowledge, please visit the [MicroPyth
 
 ***It is important to note that different Arduino boards have different implementations. This is mainly due to what microcontroller the board is based on. For example, to access digital pin 2, on the GIGA R1, you will need to use `'PA3'` (with the quotation marks). See more in [GIGA R1 Pin Map](#pin-map)***
 
-## Main.py
-
 ## File System (Mass Storage)
 
 The MicroPython installation exposes the mass storage device on your board, which can be edited directly from your computer. This allows you to install modules, edit the boot & main script as well as adding the possibility of switching between scripts.