Remove unwanted output

A LuaRocks download action on windows would cause `wget` to display some unwanted stuff. Example:

````
C:\Users\Thijs>luarocks search usb
SYSTEM_WGETRC = c:/progra~1/wget/etc/wgetrc
syswgetrc = c:/progra~1/wget/etc/wgetrc

Search results:
===============


C:\Users\Thijs>
````

This fixes the output to not display the first 2 lines above