Correct Odroid model and remove reference to WiFi

Closes #245

Author: raccube

kit/brain_board.md

@@ -7,7 +7,5 @@ Brain Board
 ===========
 
 <img src="{{ site.baseurl }}/images/content/kit/brain.png" alt="A photo of a brain board" title="A brain board" class="right" />
-The Odroid U3 Brain Board provided with your kit is what runs the code you write
+The Odroid U3+ Brain Board provided with your kit is what runs the code you write
 and controls the other peripheral boards.
-
-It can be controlled remotely over [WiFi](/docs/kit/wifi).