refactor(production): remove duplicate expression

Remove a duplicate expression (the left and right sides both check `versionInfo.currentVersion.version`). [48f0957](https://github.com/angular/angular.js/blob/48f0957dde728b050e2d8f76db81cbf12cffd42a/docs/config/services/deployments/production.js#L18) is the most recent commit I found where these expressions differ. My best guess is the duplicated expression can be removed.

Closes angular#16738

Author: teresy

docs/config/services/deployments/production.js

@@ -15,7 +15,7 @@ var cdnUrl = googleCdnUrl + versionInfo.cdnVersion;
 // docs.angularjs.org and code.angularjs.org need them.
 var versionPath = versionInfo.currentVersion.isSnapshot ?
   'snapshot' :
-  (versionInfo.currentVersion.version || versionInfo.currentVersion.version);
+  versionInfo.currentVersion.version;
 var examplesDependencyPath = angularCodeUrl + versionPath + '/';
 
 module.exports = function productionDeployment(getVersion) {