autotest: removed px4io loading instructions

Tools/autotest/web-firmware/index.html

@@ -124,26 +124,6 @@ autopilot board supported by that vehicle type
 the bottom right corner of the screen.</li>
 </ul>
 
-<h2>Loading firmware to a PX4IO board</h2>
-
-If you have
-a <a href="https://pixhawk.ethz.ch/px4/modules/px4io">PX4IO board</a>
-attached to your PX4FMU then you will need to separately load the
-latest firmware to that board. To load the PX4IO firmware you need to
-download the px4io.bin file from the above link, then put it in the
-root directory of the microSD card you have in your PX4FMU board.<p>
-
-You then need to hold the arming switch while applying power to your
-PX4FMU board. The PX4IO board detects that the arming switch is held
-when it powers on, and will enter bootloader mode, which is indicated
-by a rapidly flashing red light on your PX4IO board.<p>
-
-The APM firmware for your PX4FMU board will check in the root
-directory of your microSD card every time it boots, and if it finds a
-new px4io.bin file it will attempt to load it to your PX4IO board. A
-log of the firmware load attempt is placed in the APM directory of
-your microSD card to aid with debugging.
-
 <h2>Load your firmware using QUpgrade</h2>
 
 <p>QUpgrade is a standalone firmware upgrade tool. It can be used to download and flash the appropriate firmware for your PX4 autopilot.  Instructions and downloads for Windows, Mac Os, and Linux are available here:</p>