how to remove added file in git commit code example

Example 1: github remove a file from a commit

## Remove Files From Git Commit
## In order to remove some files from a Git commit, use the “git reset”
## command with the “–soft” option and specify the commit before HEAD.
git reset --soft HEAD~1

## Now that your files are in the staging area, you can remove them (or
## unstage them) using the “git reset” command again.
git reset HEAD <file>
git rm --cached <file>

## When you are done with the modifications, you can simply commit your
## changes again with the “–amend” option.
git commit --amend

## Check file is no longer in the list
git ls-files

## Then if you're happy, you can do your push...

Example 2: git remove added file

# you can undo git add before commit with:
git reset <file-name>
# or this command to unstage all due changes:
git reset

Example 3: git remove added file to commint

git reset file-name