Remove redundant RequestFramingMetadata.Body.none case

[dnadoba]

Motivation

The distinction between no request body (.none) and a request body of size 0 (.fixedSize(0)) is unnecessary and we explicitly have code to ignore this:

async-http-client/Sources/AsyncHTTPClient/ConnectionPool/HTTPRequestStateMachine.swift

Lines 668 to 674 in ec2e080

	case .fixedSize(let length) where length > 0:
	self.state = .running(.streaming(expectedBodyLength: length, sentBodyBytes: 0, producer: .producing), .waitingForHead)
	return .sendRequestHead(head, startBody: true)
	case .none, .fixedSize:
	// fallback if fixed size is 0
	self.state = .running(.endSent, .waitingForHead)
	return .sendRequestHead(head, startBody: false)

We can therefore just remove it.

Changes

• replace .none with .fixedSize(0)
• remove .none from the definition of RequestFramingMetadata.Body

[fabianfett]

Great improvement