diff --git a/internal/bytecounter/BUILD b/internal/bytecounter/BUILD
deleted file mode 100644
index 4a30583..0000000
--- a/internal/bytecounter/BUILD
+++ /dev/null
@@ -1,18 +0,0 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = ["bytecounter.go"],
-    importpath = "github.com/motiejus/code/undocker/internal/bytecounter",
-    visibility = ["//src/undocker:__subpackages__"],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["bytecounter_test.go"],
-    embed = [":go_default_library"],
-    deps = [
-        "@com_github_stretchr_testify//assert:go_default_library",
-        "@com_github_stretchr_testify//require:go_default_library",
-    ],
-)
diff --git a/internal/bytecounter/bytecounter.go b/internal/bytecounter/bytecounter.go
deleted file mode 100644
index 530269c..0000000
--- a/internal/bytecounter/bytecounter.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package bytecounter
-
-import "io"
-
-// ByteCounter is an io.Writer that counts bytes written to it
-type ByteCounter struct {
-	N int64
-	w io.Writer
-}
-
-// New returns a new ByteCounter
-func New(w io.Writer) *ByteCounter {
-	return &ByteCounter{w: w}
-}
-
-// Write writes to the underlying io.Writer and counts total written bytes
-func (b *ByteCounter) Write(data []byte) (n int, err error) {
-	defer func() { b.N += int64(n) }()
-	return b.w.Write(data)
-}
diff --git a/internal/bytecounter/bytecounter_test.go b/internal/bytecounter/bytecounter_test.go
deleted file mode 100644
index 000c548..0000000
--- a/internal/bytecounter/bytecounter_test.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package bytecounter
-
-import (
-	"bytes"
-	"io"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestByteCounter(t *testing.T) {
-	r := bytes.NewBufferString("0123456789")
-	w := bytes.NewBuffer(nil)
-	bc := New(w)
-	_, err := io.Copy(bc, r)
-	require.NoError(t, err)
-	assert.Equal(t, []byte("0123456789"), w.Bytes())
-	assert.Equal(t, int64(10), bc.N)
-}
-
-func TestSingleByteCounter(t *testing.T) {
-	r := bytes.NewBufferString("0123456789")
-	w := bytes.NewBuffer(nil)
-	tw := &shortWriter{w}
-	bc := New(tw)
-	_, err := io.Copy(bc, r)
-	assert.EqualError(t, err, "short write")
-	assert.Len(t, w.Bytes(), 1)
-	assert.Equal(t, int64(1), bc.N)
-}
-
-// shortWriter writes only first byte
-type shortWriter struct {
-	w io.Writer
-}
-
-// Write writes a byte to the underlying writer
-func (f *shortWriter) Write(p []byte) (int, error) {
-	return f.w.Write(p[0:1])
-}