Yuki Takei 15274b90d2 remove MATHJAX env var and replace with KaTeX 3 anni fa
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en_US 15274b90d2 remove MATHJAX env var and replace with KaTeX 3 anni fa
ja_JP 15274b90d2 remove MATHJAX env var and replace with KaTeX 3 anni fa
zh_CN 15274b90d2 remove MATHJAX env var and replace with KaTeX 3 anni fa