Gostaria de retirar a moldura preta que aparece no topo de cada página, como você pode ver na imagem abaixo.
Gostaria de saber se não houve um erro no meu preâmbulo. Como eu poderia consertar isso? Este é o meu MWE:
\documentclass{beamer}
\usetheme{default}
\usepackage{helvet}
\usepackage{framed,color}
\definecolor{shadecolor}{rgb}{0.74, 0.83, 0.9}
\useoutertheme[subsection=false]{smoothbars}
\usepackage[frenchb]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{helvet}
%%%%%%%%%%%%%%%%%paragraphes justifiés%%%%%
\usepackage{ragged2e}
\apptocmd{\frame}{}{\justifying}{} % Allow optional arguments after frame.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{caption}[numbered]
\usepackage[labelsep=period]{caption}
%%%%%%%%%%%%%%%%%%%%%footline%%%%%%%%%%%%
\addtobeamertemplate{footnote}{}{\vspace{2ex}}
\setbeamertemplate{footline}[text line]{%
\parbox{\linewidth}{\vspace*{-8pt}Title
\hfill\insertshortsubtitle\hfill\strut\insertframenumber/\inserttotalframenumber}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{navigation symbols}{}
%%%%%%%%%%%%%%%%%NUMÉROTATION TOC%%%%%%%%
\setbeamertemplate{section in toc}{\hspace*{1em}\inserttocsectionnumber.~\inserttocsection\par}
\setbeamertemplate{subsection in toc}{\hspace*{2em}\inserttocsectionnumber.\inserttocsubsectionnumber.~\inserttocsubsection\par}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\useinnertheme{circles}
\makeatletter
\patchcmd{\beamer@sectionintoc}{\vskip1.5em}{\vskip0.5em}{}{}
\makeatother
\usepackage{graphicx}
\usepackage{hyperref}
%%%%%%%%%%%%%%%%PLAN%%%%%%%%%%%%%%%%%%%%
\AtBeginSubsection[]
{
\begin{frame}<beamer>
\frametitle{Plan}
\tableofcontents[
currentsection,
sectionstyle=show/show,
subsectionstyle=show/shaded/hide
]
\end{frame}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title[]{Title}
\subtitle[]{Subtitle}
\author[]{Author}
\institute[]{}
\date[] {}
\begin{document}
\frame{\titlepage}
\begin{frame}{Plan}
\tableofcontents
\end{frame}
\end{document}