diff --git a/presentation_irstea/beamercolorthemetexsx.sty b/presentation_irstea/beamercolorthemetexsx.sty
deleted file mode 100644
index 45bfd9de4e9832769a7d279502796de02057bc8a..0000000000000000000000000000000000000000
--- a/presentation_irstea/beamercolorthemetexsx.sty
+++ /dev/null
@@ -1,9 +0,0 @@
-\mode<presentation>
-
-% Settings
-\setbeamercolor*{title page header}{fg=white}
-\setbeamercolor*{author}{fg=white}
-\setbeamercolor*{date}{fg=white}
-
-\mode
-<all>
\ No newline at end of file
diff --git a/presentation_irstea/beamerinnerthemetexsx.sty b/presentation_irstea/beamerinnerthemetexsx.sty
deleted file mode 100644
index 6050cf599c33b9ead170eebce6060ac938bdb4ee..0000000000000000000000000000000000000000
--- a/presentation_irstea/beamerinnerthemetexsx.sty
+++ /dev/null
@@ -1,34 +0,0 @@
-\mode<presentation>
-
-\setbeamertemplate{background}{
-  \begin{tikzpicture}
-  \useasboundingbox (0,0) rectangle(\the\paperwidth,\the\paperheight);
-  \fill[color=brown] (0,2) rectangle (\the\paperwidth,\the\paperheight);
-  \fill[color=orange] (0,0) rectangle(2.95,1.9);
-  \fill[color=blue!50!cyan!80] (3.05,0) rectangle(\the\paperwidth,1.9);
-  \ifnum\thepage>1\relax%
-   \fill[white,opacity=1] (0,0) rectangle(\the\paperwidth,\the\paperheight);
-   \fi
-  \end{tikzpicture}
-}
-
-% Title page
-\defbeamertemplate*{title page}{texsx}[1][]
-{ 
-   \vskip6cm%
-    \begin{beamercolorbox}[wd=12cm,leftskip=3cm,sep=8pt,#1]{title page header}
-      \usebeamerfont{title}\inserttitle\par%
-    \end{beamercolorbox}%
-    \vskip0.75cm%
-    \begin{beamercolorbox}[wd=12cm,leftskip=3cm,#1]{author}
-      \usebeamerfont{author}\insertauthor%
-    \end{beamercolorbox}
-     \vskip0.2cm%
-    \begin{beamercolorbox}[wd=12cm,leftskip=3cm,#1]{date}
-      \usebeamerfont{author}\insertdate%
-    \end{beamercolorbox}
-  \vfill
-}
-
-\mode
-<all>
\ No newline at end of file
diff --git a/presentation_irstea/beamerouterthemetexsx.sty b/presentation_irstea/beamerouterthemetexsx.sty
deleted file mode 100644
index 137e7562f2f24ac372046c2d91557a7353f7c504..0000000000000000000000000000000000000000
--- a/presentation_irstea/beamerouterthemetexsx.sty
+++ /dev/null
@@ -1,22 +0,0 @@
-\mode<presentation>
-
-% Frame title
-\defbeamertemplate*{frametitle}{texsx}[1][]
-{
-\vskip1cm%
-  \begin{beamercolorbox}[wd=\paperwidth,ht=1.2cm]{frametitle} 
-  \begin{tikzpicture}
-  \useasboundingbox[fill=white](0,0) rectangle(\the\paperwidth,1.2);
-  \fill[orange] (0,0) rectangle(2.95,1.2);
-  \fill[blue!50!cyan!80] (3.05,0) rectangle(\the\paperwidth,1.2);
-   \ifx\insertframesubtitle\@empty%
-      {\node[anchor=west, white,font=\large] at (3.2,0.61){\insertframetitle};}
-      \else%
-      {\node[anchor= west, white,font=\large] at (3.2,0.81){\insertframetitle};%
-       \node[anchor= west, white,font=\small] at (3.2,0.41){\insertframesubtitle};}%
-      \fi
-  \end{tikzpicture}
-  \end{beamercolorbox}
-}
-
-\mode<all>
\ No newline at end of file
diff --git a/presentation_irstea/beamerthemetexsx.sty b/presentation_irstea/beamerthemetexsx.sty
deleted file mode 100644
index 159b8fce86f5f0eb7709a807f3345921315df945..0000000000000000000000000000000000000000
--- a/presentation_irstea/beamerthemetexsx.sty
+++ /dev/null
@@ -1,14 +0,0 @@
-\mode<presentation>
-
-% Requirement
-\RequirePackage{tikz}
-
-% Settings
-\useinnertheme{texsx}
-\useoutertheme{texsx}
-\usecolortheme{texsx}
-
-\setbeamertemplate{navigation symbols}{}
-\setbeamertemplate{blocks}[rounded][shadow=true]  
-
-\mode<all>
\ No newline at end of file