Enhance copy_links and some code cleaning

[drscholly]

Checklist

• I have read the Contribution Guide ;
• I have read the Contributor License Agreement (CLA) and understand that the submission of this PR will constitute an electronic signature of my agreement of the terms and conditions of DataGalaxy's CLA ;
• There is an approved issue describing the change when contributing a new feature ;
• I have added tests that prove my fix is effective or that my feature works ;
• I have added necessary documentation (if appropriate) ;

Short description of what this resolves:

After the recent upgrades, copy_links method is now updated to use the latest developments. As a consequence, some legacy code that is not used anymore is deleted.

Changes proposed in this pull request:

• Enhance copy_links
• Delete legacy code