I have a ST3 package hosted on GitHub and available through Package Control. It has been superseded by a new package that I wrote, but I keep getting bug reports for the old one since many people are still using it.
What is the correct way to remove the option to install the original package from package control, and ideally from GitHub if possible, without messing anything up for users who currently have the old package installed?
Specifically, will submitting a pull request to Package Control to remove the old package, and/or deleting the old package's github repo, cause the old package to disappear from people's Sublime Text?
I strongly suggest reading through the package developer docs, especially the section entitled Renaming a Package, as they explain everything in detail. Essentially, the easiest path would be to following the directions for renaming a package, and at the same time change the URL to your new Github repo. This way, the old packagecontrol.io page will no longer be available, and upon restart users of the old package should be upgraded to the new one.
I'd also recommend reading through the Package Control Channel's issues to see if this issue has come up before. Worst case scenario, you submit your PR and it gets rejected for some reason, but they'll explain what you need to do differently.