Delete a line from the following table

With the following codes, I get

documentclass[11pt]{scrartcl}
usepackage{tikz,tkz-tab,amsmath}
usetikzlibrary{arrows}

begin{document}

begin{tikzpicture}
tikzset{arrow style/.style = {blue,->,> = latex',
shorten > = 6pt,
shorten < = 6pt}}
tkzTabInit[espcl=5]{$x$ /1, $f(x)$ /1.5, $g(x)$ /2}{$0$ ,$1$ , $+infty$}%
tkzTabLine{d,-,z,+,}
tkzTabVar%
{ D+/ / $0$ ,%
-/ -2/ ,+/ $+infty$ / }%
end{tikzpicture}
end{document}

I get

I want to delete the first line of the above table. i.e., I want to get

documentclass[11pt]{scrartcl}
usepackage{tikz,tkz-tab,amsmath}
usetikzlibrary{arrows}

begin{document}

begin{tikzpicture}
    tikzset{arrow style/.style = {blue,->,> = latex',
shorten > = 6pt,
shorten < = 6pt}}
tkzTabInit[espcl=5]{$x$ /1, $g(x)$ /1}
                    {$0$ ,$1$ , $+infty$}%
tkzTabVar%
{ D+/ / $0$ ,%
-/ -2/ ,+/ $+infty$ / }%
    end{tikzpicture}
end{document}