recently, I want to replace pyenv with pipenv, so I want to delete pyenv completely

I did these three things

1. rm-rf ~ / .pyenv
2. brew uninstall pyenv pyenv-virtualenv-- force
3. delete pyenv-related configurations in .zshrc

but when I execute where pyenv , I get:

pyenv () {
        local command
        command="${1:-}"
        if [ "$-sharp" -gt 0 ]
        then
                shift
        fi
        case "$command" in
                (activate | deactivate | rehash | shell) eval "$(pyenv "sh-$command" "$@")" ;;
                (*) command pyenv "$command" "$@" ;;
        esac
}
pyenv:11: command not found: pyenv

I"m confused. I don"t know where this definition came from.
and any command I type in terminal seems to report pyenv:11: command not found: pyenv , including just typing enter. It looks annoying

the pyenv plugin for oh-my-zsh is also turned off in note:.zshrc