Revert "[testing] make grid line color by red by default"
Revert "[testing] make grid line color by red by default"

This reverts commit c2fe95eb02db87805ee036b042eecfc96275573d.

asolagmbh/plotly.js,aburato/plotly.js,etpinard/plotly.js,etpinard/plotly.js,asolagmbh/plotly.js,iongroup/plotly.js,plotly/plotly.js,plotly/plotly.js,asolagmbh/plotly.js,etpinard/plotly.js,plotly/plotly.js,plotly/plotly.js,iongroup/plotly.js,aburato/plotly.js,iongroup/plotly.js