Fix readme removing warning about completion handler.

[dzyp]

I do not believe this is true any longer.

@lyddonb @robertkluin @tannermiller-wf @rosshendrickson-wf

[aviary2-wf]

Raven

Number of Findings: 0

[lyddonb]

+1

[tannermiller-wf]

+1 Huh, I thought I had write access to this repo, guess not. Maybe @rosshendrickson-wf does.

[robertkluin]

+1 @tannermiller-wf, it was probably @lyddonb who used to have access. ;)

[tannermiller-wf]

That's what I'm afraid of, you guys had write access and we don't :)

[lyddonb]

I'm pretty certain we handed ownership over to @rosshendrickson-wf

So @tannermiller-wf you should go drop some elbows to get some merging happening :)