rm duplicate pathToMocks constant,

  use pathToTestImageMocks in shortcut_paths

Author: etpinard

tasks/util/constants.js

@@ -15,7 +15,6 @@ var pathToTopojsonSrc = path.join(
 module.exports = {
     pathToRoot: pathToRoot,
     pathToSrc: pathToSrc,
-    pathToMocks: path.join(pathToRoot, 'test/image/mocks'),
 
     pathToPlotlySrc: path.join(pathToSrc, 'index.js'),
     pathToPlotlyBuild: path.join(pathToBuild, 'plotly.js'),

tasks/util/shortcut_paths.js

@@ -10,7 +10,7 @@ var constants = require('./constants');
 
 var shortcutsConfig = {
     '@src': constants.pathToSrc,
-    '@mocks': constants.pathToMocks
+    '@mocks': constants.pathToTestImageMocks
 };
 
 module.exports = transformTools.makeRequireTransform('requireTransform',