make gl2d traces skip over Axes.expand step in heatmap calc
make gl2d traces skip over Axes.expand step in heatmap calc

- as it is now called in the convert step
- no duplication

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