It wasn’t me. I don’t know much about wedding vow history, except that stuck-on components like having the bride’s father escort her, the unity candle, and taking flowers over to the Marian altar have been pretty much the norm, differing from one area to another. It would seem that somebody is always adding something like that. That doesn’t make it an official part of the rite. It got to the point, though, where some parishes and dioceses put strict limits on what could be added, some banning the unity candle altogether.
As far as I know, the Catholic marriage rite has two necessary components:
The part where the couple publicly acknowledges key points regarding whether they know what they’re getting into, such as being willing to welcome children, and so on, and state that they come freely willing and freely able to marry.
The part where the vows are exchanged. The bride and groom do it, but generally in a “repeat after me” format, because so few people think they’ll be able to remember their own first name at the altar, even given the first three letters. This is the “I, Name, take you, Name…” part. This is when the rings are exchanged, too, but as far as I know, that is optional. I have never been to a Catholic wedding in which the bride and groom did not exchange identical vows, so I don’t know how “obey” would have ever fit into that. As I said, though, I don’t know the full history of the rite.
Also, the Church usually adds a nuptial blessing afterward, which in my lifetime has fallen somewhere during the Communion Rite at a nuptial Mass. At that point, though, the couple is fully married. The marriage would be valid without it.