pgfplots: How to remove all axis lines of polaraxis?

I need to draw a polar coordinate system without border lines. Adding axis lines=none (without star) to pgfplot's polaraxis argument list blanks out the coordinate system completely (including grid lines, tick lines, etc). Adding axis lines*=none (with star) as in the following MWE removes the black axis line at the inner edge and the left edge of the sector. That's already half the job -- how can I remove the outer edge and the right edge? (cf. screenshot below)

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\usetikzlibrary{pgfplots.polar}
\begin{document}
\begin{tikzpicture}
\begin{polaraxis}[%
xmin=-5,%
xmax=95,%
ymin=10,%
ymax=30,%
axis lines*=none,%
]
\end{polaraxis}
\end{tikzpicture}
\end{document}


Add axis line style = {draw=white,line width=0.0001pt}, to the options (bit of a hack though). You can even omit draw=white and simply put axis line style = {line width=0.0001pt},. Line is there but invisible.

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\usetikzlibrary{pgfplots.polar}
\begin{document}
\begin{tikzpicture}
\begin{polaraxis}[%
xmin=-5,%
xmax=95,%
ymin=10,%
ymax=30,%
axis lines*=none,%
axis line style = {draw=white,line width=0.0001pt},
]
\end{polaraxis}
\end{tikzpicture}
\end{document}


• It turns out that axis line style = {transparent} also works :-). – Ulf Schaper Aug 19 '14 at 11:23