As we are not shipping with the submodule change, remove the
entry for it.
fully for paths the index knows about but the tree-ish the command
resets to does not (these paths are kept as intend-to-add entries).
- * Newly cloned submodule repositories by "git submodule update",
- when the "checkout" update mode is used, will be on a local
- branch instead of on a detached HEAD, just like submodules added
- with "git submodule add".
-
Performance, Internal Implementation, etc.