Removing subproject commit from github

Question

I have two repositories namely A and B. By mistake I cloned repo B inside A on my machine. I removed all the code from the repo B but when I pushed and merged my code from A on origin, it also shows a subproject commit B on Github repo.

I want to remove the subproject commit from my master on origin. Will these steps work?

1. rmdir B (on my local repo A) 2. Pushing my repo A to origin 3. Merging

Answer 1

Since GitHub displays B as a gray folder within A repo, that means B has been added to A as a submodule.
That gray folder is a gitlink, a special entry in the index.

See "How do I remove a Git submodule?":
Locally, do git submodule deinit asubmodule and git rm B (B without any trailing slash B/).
Then push to GitHub, and B should be gone.

Answer 2

Assuming you want to remove commit which shown in diff like

-Subproject commit <old commit hash>
+Subproject commit <new commit hash>

go to submodule directory, than

git checkout <old commit hash>

return back to main project:

git add .
git commit --amend --no-edit
git push