test: Simplfiy basic latex file.

Drop use of packages not germaine to the basic goal of these tests,
which is not to test the completeness of the existing TeX installation,
but to check that tartex works if the tex file is basically compilable.

tests/test_basic_latex/basic_latex.tex

@@ -1,29 +1,6 @@
 \documentclass{article}
 
-\usepackage{fancyhdr}
-\usepackage{lipsum}% just to generate text for the example
-% https://tex.stackexchange.com/questions/13387/how-to-get-part-name-in-latex
-\let\Oldpart\part
-\newcommand{\parttitle}{}
-\renewcommand{\part}[1]{\Oldpart{#1}\renewcommand{\parttitle}{#1}}
-\pagestyle{fancy}
-\fancyhf{}
-% Set \parttitle for top left corner of each page
-\fancyhead[L]{\parttitle}
-% Right top corner for page number
-\fancyhead[R]{\thepage}
-\renewcommand{\headrulewidth}{0pt}
-
 \begin{document}
-\part{2024}
-\section{Dec}
-
-\lipsum[1-10]
-
-\part{2023}
-\section{Dec}
-\lipsum[1-10]
-
+\section{Test document section}
+This is a test document.
 \end{document}
-
-