Drop addition of X2 to LaTeX test to avoid extra dependencies for CI

This can be reverted if adding the extra dependencies is deemed worth
it, but it means having to look at Debian packaging and currently means
adding texlive-lang-cyrillic as requirement

tests/roots/test-root/conf.py

@@ -41,7 +41,6 @@ html_last_updated_fmt = '%b %d, %Y'
 html_context = {'hckey': 'hcval', 'hckey_co': 'wrong_hcval_co'}
 
 latex_additional_files = ['svgimg.svg']
-latex_elements = {'fontenc':'\\usepackage[X2,LGR,T1]{fontenc}'}
 
 coverage_c_path = ['special/*.h']
 coverage_c_regexes = {'function': r'^PyAPI_FUNC\(.*\)\s+([^_][\w_]+)'}