Revert "no longer need to tweak mathjax config in texToSVG"
Revert "no longer need to tweak mathjax config in texToSVG"

This reverts commit 721d634776c43b27a3365bfc76ee436793acdcdb.

plotly/plotly.js,etpinard/plotly.js,plotly/plotly.js,plotly/plotly.js,etpinard/plotly.js,plotly/plotly.js,etpinard/plotly.js