Revert "[tmp] replace 'scattergl' traces w/ 'scatter'"

This reverts commit d63578b.

Author: etpinard

test/image/assets/get_image_request_options.js

@@ -17,12 +17,6 @@ module.exports = function getRequestOpts(specs) {
     var pathToMock = path.join(constants.pathToTestImageMocks, specs.mockName) + '.json';
     var figure = require(pathToMock);
 
-    figure.data.forEach(function(t) {
-        if(t.type === 'scattergl') {
-            t.type = 'scatter';
-        }
-    })
-
     var body = {
         figure: figure,
         format: specs.format || DEFAULT_FORMAT,