clean(templates): remove extra file

Refs #13

inst/templates/umr_geau/logos.tex

-% Example of logos layout for page "cover_inrae.tex"
-
-\hfill
-\includegraphics[width=4cm]{../inrae/logo_inrae_couv_haut.png}
-
-\vspace{3mm}
-
-\hfill
-\includegraphics[width=4cm]{../umr_geau/logo_umr_geau.png}
-
-\vspace{3mm}
-
-\hfill
-% \includegraphics[width=4cm]{../../templates/inrae/emplacement_logo.jpg}
-
-\vspace{3mm}
-
-\hfill
-% \includegraphics[width=4cm]{../../templates/inrae/emplacement_logo.jpg}