Remove deprecated APIs

[ikesyo]

Closes #191.

[mdiep]

Can we mark these as unavailable as well?

[ikesyo]

Unfortunately no. The operator definitions must be remained to do that. However, we actually want to remove the operators to close #191.

[mdiep]

I suppose we should look into removing ResultProtocol and doing a 4.0 release?

[Thomvis]

@mdiep I proposed adding the ResultProtocol (a long time ago) to be able to do https://github.com/Thomvis/BrightFutures/blob/master/Sources/BrightFutures/AsyncType%2BResultType.swift#L10. But that no longer requires a protocol in Swift 3.1, right?

[mdiep]

But that no longer requires a protocol in Swift 3.1, right?

Correct

[ikesyo]

@Thomvis @mdiep I think for that purpose Parameterized extensions is needed since Result itself is generic, which is not implemented yet in Swift 3.1.

import Result

public extension<T, E> AsyncType where Value == Result<T, E> {
    public var value: T? { ... }
    public var error: E? { ... }
}

[ikesyo]

@mdiep @Thomvis Do you have further concerns? I'd like to have Result 4.0 with these changes for the forthcoming ReactiveSwift 2.0.

[andersio]

The protocol can be reduced to return the concrete type like OptionalProtocol in RAS, and have all methods moved to the concrete type.