lint and minor perf improvements in Cartesian.clean
lint and minor perf improvements in Cartesian.clean

- use fullLayout[axName] instead of indexOf into axis list
- for-in loop instead Object.keys + for-loop

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