Remove the description of dropping 'NS' prefix

[JustinJiaDev]

Remove " We will also drop the 'NS' prefix from all Foundation classes." according to swiftlang/swift-evolution@bf2e4c4

[parkera]

We can discuss the goals of the project on the mailing list.

[JustinJiaDev]

@parkera Hi! In my understand, Swift 3 are not going to drop the NS prefix. README.md was written before this change. Therefore, this sentence is no longer valid and should be removed. It will confuse people.

One significant part of the proposal was the removal of the "NS" prefix from Foundation APIs in Swift. This name change was considered problematic for several reasons, the most-often-cited one being that the reference-semantic nature of many Foundation types conflicted with the Swift standard library's value-semantic types. The "NS" prefix removal part of this proposal has been removed from the accepted proposal. A revised version of this will come back as its own proposal, taking into account the feedback received.

[parkera]

It is still part of the plan, we are iterating on exactly how to do it.

[ianpartridge]

Thanks for this information @parkera - do you have links to the discussion/iteration? I think there's a lot of interest in how the Foundation APIs evolve.

[parkera]

Not just yet, but soon.

[tomquist]

I think this proposal is one step in removing "NS" prefixes: https://github.com/apple/swift-evolution/blob/master/proposals/0069-swift-mutability-for-foundation.md