LaTeX template: Remove obsolete fixltx2e package

data/templates/default.latex

@@ -70,7 +70,6 @@ $if(linestretch)$
 $endif$
 \usepackage{amssymb,amsmath}
 \usepackage{ifxetex,ifluatex}
-\usepackage{fixltx2e} % provides \textsubscript
 \ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
   \usepackage[$if(fontenc)$$fontenc$$else$T1$endif$]{fontenc}
   \usepackage[utf8]{inputenc}