Remove lessc from testdeps
    
    We decided that instead, we will just run a lessc in patchsets where
    we edit the less source file, removing the requirement to have nodejs
    for every Ipsilon development setup.
    
    Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>
    Reviewed-by: Howard Johnson <merlin@merlinthp.org>