[Tex/LaTex] Hide section* from sidebar

beamer

I'm creating a beamer presentation but I have an unsolved problem:
I wanted Introduction and Conclusion sections before and after the core of my presentation.
I wanted them unnumbered (\section*} but they still appear on the sidebar and take 2 lines on each frame…

I have also tried \section*[]{} that displays a "[" in the sidebar…

Edit: The structure of the document:

\documentclass[handout]{beamer}

\usetheme{Warsaw}

\begin{document}

    \begin{frame}
        \titlepage
    \end{frame}

    \section*{Introduction}

    \begin{frame}{Introduction}

    \end{frame}

    \begin{frame}{Outline}
        \tableofcontents[pausesections]
    \end{frame}

    \section{Context}
    % Slides of Context section
    \section{Development}
    % Slides of Development section
    \section{Results}
    % Slides of Development section

    \section*{Conclusion}

    \begin{frame}{Conclusion}

    \end{frame}

\end{document}

The idea is hide the Introduction and Conclusion sections from the side bar

Thanks for your help

Best Answer

This problem is two-folded:

1) removing the introduction is already covered in alwaysasks answer, just don't use any section \section{} which will not show up in the headline.

2) With the conclusion it is a bit different. If you don't use a section, it will automatically be part of the previous section. To prevent this, you can place an empty section \section{}

\documentclass[handout]{beamer}

\usetheme{Warsaw}

\begin{document}

    \begin{frame}
        \titlepage
    \end{frame}

    \begin{frame}{Introduction}

    \end{frame}

    \begin{frame}{Outline}
        \tableofcontents[pausesections]
    \end{frame}

    \section{Context}
    % Slides of Context section
    \section{Development}
    % Slides of Development section
    \section{Results}
    \frame{}
    % Slides of Development section
        \section{}
    \begin{frame}{Conclusion}

    \end{frame}

\end{document}

enter image description here

EDIT 2018

The above solution no longer works with the current version of beamer, use the following code instead:

\documentclass{beamer}

\usetheme{Warsaw}

\makeatletter
\let\beamer@writeslidentry@miniframeson=\beamer@writeslidentry%
\def\beamer@writeslidentry@miniframesoff{%
  \expandafter\beamer@ifempty\expandafter{\beamer@framestartpage}{}% does not happen normally
  {%else
    % removed \addtocontents commands
    \clearpage\beamer@notesactions%
  }
}
\newcommand*{\miniframeson}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframeson}
\newcommand*{\miniframesoff}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframesoff}
\makeatother

\begin{document}

    \begin{frame}
        \titlepage
    \end{frame}

    \begin{frame}{Introduction}

    \end{frame}

    \begin{frame}{Outline}
        \tableofcontents[pausesections]
    \end{frame}

    \section{Context}
    % Slides of Context section
    \section{Development}
    % Slides of Development section
    \section{Results}
    \frame{}
    % Slides of Development section
    \miniframesoff
        \section{}
    \begin{frame}{Conclusion}

    \end{frame}

\end{document}
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