remove unused GetHighestInOrderPacketNumber method from QUIC 34 ACK frame

ref #182

frames/ack_frame_new.go

@@ -296,14 +296,6 @@ func (f *AckFrameNew) HasMissingRanges() bool {
 	return false
 }
 
-// GetHighestInOrderPacketNumber gets the highest in order packet number that is confirmed by this ACK
-func (f *AckFrameNew) GetHighestInOrderPacketNumber() protocol.PacketNumber {
-	if f.HasMissingRanges() {
-		panic("NACKs not yet implemented")
-	}
-	return f.LargestObserved
-}
-
 func (f *AckFrameNew) validateAckRanges() bool {
 	if len(f.AckRanges) == 0 {
 		return true

frames/ack_frame_new_test.go

@@ -574,13 +574,4 @@ var _ = Describe("AckFrame", func() {
 			Expect(ack.validateAckRanges()).To(BeTrue())
 		})
 	})
-
-	Context("highest in order packet number", func() {
-		It("gets the hightest in order packet number for a simple ACK", func() {
-			frame := &AckFrameNew{
-				LargestObserved: 0x1337,
-			}
-			Expect(frame.GetHighestInOrderPacketNumber()).To(Equal(protocol.PacketNumber(0x1337)))
-		})
-	})
 })