Remove arrayOk attribute from the marker.line attribute of the scatter plot

Author: chrimaho

src/traces/scatter/attributes.js

@@ -556,7 +556,6 @@ module.exports = {
                         description: 'Sets the width (in px) of the lines bounding the marker points.'
                     },
                     dash: extendFlat({}, dash, {
-                        arrayOk: true,
                         editType: 'style'
                     }),
                     editType: 'calc'