[BL training-materials-updates] Remove network setup screenshot

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=893c52afabfdca8675093a443f0380c15fafecd6

>---------------------------------------------------------------

commit 893c52afabfdca8675093a443f0380c15fafecd6
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Tue Apr 10 06:43:32 2018 +0200

    Remove network setup screenshot
    
    - It was causing image definition issues when I was trying
      to submit the labs to Amazon CreateSpace.
    
    - Didn't really manage to understand why this happened
      (tried various options). Anyway, this image took space
      and is not essential.
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


>---------------------------------------------------------------

893c52afabfdca8675093a443f0380c15fafecd6
 labs/sysdev-u-boot/network-config-1.png | Bin 37494 -> 0 bytes
 labs/sysdev-u-boot/network-config-2.png | Bin 20437 -> 20455 bytes
 labs/sysdev-u-boot/network-config-3.png | Bin 43472 -> 43490 bytes
 labs/sysdev-u-boot/sysdev-u-boot.tex    |   4 ----
 4 files changed, 4 deletions(-)

diff --git a/labs/sysdev-u-boot/network-config-1.png b/labs/sysdev-u-boot/network-config-1.png
deleted file mode 100644
index d87416b..0000000
Binary files a/labs/sysdev-u-boot/network-config-1.png and /dev/null differ
diff --git a/labs/sysdev-u-boot/network-config-2.png b/labs/sysdev-u-boot/network-config-2.png
index 6942628..228eeaf 100644
Binary files a/labs/sysdev-u-boot/network-config-2.png and b/labs/sysdev-u-boot/network-config-2.png differ
diff --git a/labs/sysdev-u-boot/network-config-3.png b/labs/sysdev-u-boot/network-config-3.png
index 6b29059..c350d48 100644
Binary files a/labs/sysdev-u-boot/network-config-3.png and b/labs/sysdev-u-boot/network-config-3.png differ
diff --git a/labs/sysdev-u-boot/sysdev-u-boot.tex b/labs/sysdev-u-boot/sysdev-u-boot.tex
index b8640f0..0b8a89f 100644
--- a/labs/sysdev-u-boot/sysdev-u-boot.tex
+++ b/labs/sysdev-u-boot/sysdev-u-boot.tex
@@ -307,10 +307,6 @@ To configure this network interface on the workstation side, click on
 the {\em Network Manager} tasklet on your desktop, and select {\em
   Edit Connections}.
 
-\begin{center}
-\includegraphics[width=5cm]{labs/sysdev-u-boot/network-config-1.png}
-\end{center}
-
 Select {\em Wired connection 1} and press the {\em Edit} button.
 
 \begin{center}