diff --git a/ackhandlernew/entropy_accumulator.go b/ackhandlernew/entropy_accumulator.go
deleted file mode 100644
index f5d1f902..00000000
--- a/ackhandlernew/entropy_accumulator.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package ackhandlernew
-
-import "github.com/lucas-clemente/quic-go/protocol"
-
-// EntropyAccumulator accumulates the entropy according to the QUIC docs
-type EntropyAccumulator byte
-
-// Add the contribution of the entropy flag of a given packet number
-func (e *EntropyAccumulator) Add(packetNumber protocol.PacketNumber, entropyFlag bool) {
-	if entropyFlag {
-		(*e) ^= 0x01 << (packetNumber % 8)
-	}
-}
-
-// Subtract the contribution of the entropy flag of a given packet number
-func (e *EntropyAccumulator) Subtract(packetNumber protocol.PacketNumber, entropyFlag bool) {
-	e.Add(packetNumber, entropyFlag)
-}
-
-// Get the byte of entropy
-func (e *EntropyAccumulator) Get() byte {
-	return byte(*e)
-}
diff --git a/ackhandlernew/entropy_accumulator_test.go b/ackhandlernew/entropy_accumulator_test.go
deleted file mode 100644
index be101ad5..00000000
--- a/ackhandlernew/entropy_accumulator_test.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package ackhandlernew
-
-import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-)
-
-var _ = Describe("EntropyAccumulator", func() {
-	It("initializes as zero", func() {
-		var e EntropyAccumulator
-		Expect(e.Get()).To(BeZero())
-	})
-
-	Context("Add", func() {
-		It("adds entropy", func() {
-			var e EntropyAccumulator
-			e.Add(9, true)
-			Expect(e.Get()).To(Equal(byte(0x02)))
-		})
-
-		It("doesn't add entropy for zero entropy flags", func() {
-			var e EntropyAccumulator
-			e.Add(9, false)
-			Expect(e.Get()).To(BeZero())
-		})
-	})
-
-	Context("Subtract", func() {
-		It("calculates the correct entropy", func() {
-			var e1 EntropyAccumulator
-			e1.Add(3, true)
-
-			var e2 EntropyAccumulator
-			e2.Add(1, true)
-			e2.Add(3, true)
-			e2.Subtract(1, true)
-
-			Expect(e1).To(Equal(e2))
-		})
-	})
-})