just be careful with those plastic injector clips! They are always very brittle. Now I would order a set of replacements just to have ready in case you break one.
I've found that normal driving without it is fine, except for hard panic stops where I lock up the rears, I have discs though so I don't know how that will go for you.
I'd delete it for the sake of simplifying and eliminating several feet of brake line. I made a thread on which fittings to plug...