Documentation/git-update-ref.txt: remove confusing paragraph
This paragraph interrupts the flow of the section by going into detail about what a symbolic ref file is and how it is implemented. It is not clear what the purpose is since symbolic refs were already mentioned prior (“possibly dereferencing the symbolic refs”). Worse, it can confuse the reader about what argument can be a symbolic ref since it just says “it” and not which of the parameters; in turn the reader can be lead to try `<new-oid>` and then get a confusing error since update-ref will just say that it is not a valid SHA1. gitglossary(7) already documents what a symref is, concretely, and quite well at that. Reported-by: Bence Ferdinandy <bence@ferdinandy.com> Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name> Signed-off-by: Taylor Blau <me@ttaylorr.com>