删除标题投影仪默认主题中的子部分

Question

我正在尝试基于 beamer 默认主题制作一个简单的模板。我对标题有以下目标：

• 只对部分内容使用进度项目符号
• 文本：章节、框架标题
• 优化空间（例如删除任何多余的行跳过）

我无法定义\setbeamertemplate{headline}符合这些条件的标题模板。我使用的是 emacs+auctex+texlive2019。这是我的代码：

\documentclass{beamer}
\usepackage[french,english]{babel}
\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.multipart}
\usepackage{graphicx}
\graphicspath{
  {"../template_gipsa/images/"}
  {"../template_gipsa/images/}
  {"./images/"}
  {"./images/}
}

\usepackage[backend=biber,style=numeric-comp,sorting=none]{biblatex}
\addbibresource{biblio.bib}
\AtEveryCitekey{\clearfield{url}  \clearfield{note}}
\setbeamerfont{footnote}{size=\tiny}

%%% template
\usetheme{default}
\usecolortheme{default} 
\usefonttheme{default}
\beamertemplatenavigationsymbolsempty
\setbeamerfont{frametitle}{family=\rm}
\setbeamerfont{title}{family=\rm}
\useoutertheme{miniframes}
\AtBeginSection[]{\section{}}

\setbeamertemplate{frametitle}{
  \hbox{
    \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=0pt]{}
      \hspace*{0.em}\vspace{12pt}
      \insertframetitle
    \end{beamercolorbox}
  }
}

\defbeamertemplate{title page}{customized}[1][]
{
  \usebeamerfont{title}\inserttitle\par
  \bigskip
  \usebeamerfont{author}\insertauthor\par
  \usebeamerfont{date}\insertdate\par
  \usebeamercolor[fg]{titlegraphic}\inserttitlegraphic
}

\AtBeginSection{ 
  \begin{frame}
    \frametitle{Sommaire}
    \tableofcontents[currentsection,hideothersubsections]
  \end{frame}
}

\AtBeginSubsection[]{
  \begin{frame}{Sommaire}
    \small \tableofcontents[currentsubsection]
  \end{frame}
}

\setbeamertemplate{footline}
{
  \leavevmode
  \hbox{
  \begin{beamercolorbox}[wd=.4\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}
  \end{beamercolorbox}
  \begin{beamercolorbox}[wd=.43\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}
  \end{beamercolorbox}
  \begin{beamercolorbox}[wd=.15\paperwidth,ht=2.25ex,dp=1ex,right]{title in head/foot}
    \insertframenumber{} / \inserttotalframenumber\hspace*{1ex}
  \end{beamercolorbox}}
  \vskip0pt
}
\begin{document}
\begin{frame}
  \titlepage
\end{frame}
\section{Section}
\subsection{subsection}
\begin{frame}
  \frametitle{Title}
  blaa
\end{frame}