1 files changed, 0 insertions, 104 deletions
diff --git a/pkg/fspath/builder.go b/pkg/fspath/builder.go
deleted file mode 100644
index 7ddb36826..000000000
--- a/pkg/fspath/builder.go
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package fspath
-
-import (
-	"fmt"
-)
-
-// Builder is similar to strings.Builder, but is used to produce pathnames
-// given path components in reverse order (from leaf to root). This is useful
-// in the common case where a filesystem is represented by a tree of named
-// nodes, and the path to a given node must be produced by walking upward from
-// that node to a given root.
-type Builder struct {
-	buf     []byte
-	start   int
-	needSep bool
-}
-
-// Reset resets the Builder to be empty.
-func (b *Builder) Reset() {
-	b.start = len(b.buf)
-	b.needSep = false
-}
-
-// Len returns the number of accumulated bytes.
-func (b *Builder) Len() int {
-	return len(b.buf) - b.start
-}
-
-func (b *Builder) needToGrow(n int) bool {
-	return b.start < n
-}
-
-func (b *Builder) grow(n int) {
-	newLen := b.Len() + n
-	var newCap int
-	if len(b.buf) == 0 {
-		newCap = 64 // arbitrary
-	} else {
-		newCap = 2 * len(b.buf)
-	}
-	for newCap < newLen {
-		newCap *= 2
-		if newCap == 0 {
-			panic(fmt.Sprintf("required length (%d) causes buffer size to overflow", newLen))
-		}
-	}
-	newBuf := make([]byte, newCap)
-	copy(newBuf[newCap-b.Len():], b.buf[b.start:])
-	b.start += newCap - len(b.buf)
-	b.buf = newBuf
-}
-
-// PrependComponent prepends the given path component to b's buffer. A path
-// separator is automatically inserted if appropriate.
-func (b *Builder) PrependComponent(pc string) {
-	if b.needSep {
-		b.PrependByte('/')
-	}
-	b.PrependString(pc)
-	b.needSep = true
-}
-
-// PrependString prepends the given string to b's buffer.
-func (b *Builder) PrependString(str string) {
-	if b.needToGrow(len(str)) {
-		b.grow(len(str))
-	}
-	b.start -= len(str)
-	copy(b.buf[b.start:], str)
-}
-
-// PrependByte prepends the given byte to b's buffer.
-func (b *Builder) PrependByte(c byte) {
-	if b.needToGrow(1) {
-		b.grow(1)
-	}
-	b.start--
-	b.buf[b.start] = c
-}
-
-// AppendString appends the given string to b's buffer.
-func (b *Builder) AppendString(str string) {
-	if b.needToGrow(len(str)) {
-		b.grow(len(str))
-	}
-	oldStart := b.start
-	b.start -= len(str)
-	copy(b.buf[b.start:], b.buf[oldStart:])
-	copy(b.buf[len(b.buf)-len(str):], str)
-}