Revert "Merge pull request #47353 from apelisse/http-cache"

This reverts commit fc89743dca, reversing
changes made to 29ab38e898.

vendor/github.com/peterbourgon/diskv/compression.go

@@ -1,64 +0,0 @@
-package diskv
-
-import (
-	"compress/flate"
-	"compress/gzip"
-	"compress/zlib"
-	"io"
-)
-
-// Compression is an interface that Diskv uses to implement compression of
-// data. Writer takes a destination io.Writer and returns a WriteCloser that
-// compresses all data written through it. Reader takes a source io.Reader and
-// returns a ReadCloser that decompresses all data read through it. You may
-// define these methods on your own type, or use one of the NewCompression
-// helpers.
-type Compression interface {
-	Writer(dst io.Writer) (io.WriteCloser, error)
-	Reader(src io.Reader) (io.ReadCloser, error)
-}
-
-// NewGzipCompression returns a Gzip-based Compression.
-func NewGzipCompression() Compression {
-	return NewGzipCompressionLevel(flate.DefaultCompression)
-}
-
-// NewGzipCompressionLevel returns a Gzip-based Compression with the given level.
-func NewGzipCompressionLevel(level int) Compression {
-	return &genericCompression{
-		wf: func(w io.Writer) (io.WriteCloser, error) { return gzip.NewWriterLevel(w, level) },
-		rf: func(r io.Reader) (io.ReadCloser, error) { return gzip.NewReader(r) },
-	}
-}
-
-// NewZlibCompression returns a Zlib-based Compression.
-func NewZlibCompression() Compression {
-	return NewZlibCompressionLevel(flate.DefaultCompression)
-}
-
-// NewZlibCompressionLevel returns a Zlib-based Compression with the given level.
-func NewZlibCompressionLevel(level int) Compression {
-	return NewZlibCompressionLevelDict(level, nil)
-}
-
-// NewZlibCompressionLevelDict returns a Zlib-based Compression with the given
-// level, based on the given dictionary.
-func NewZlibCompressionLevelDict(level int, dict []byte) Compression {
-	return &genericCompression{
-		func(w io.Writer) (io.WriteCloser, error) { return zlib.NewWriterLevelDict(w, level, dict) },
-		func(r io.Reader) (io.ReadCloser, error) { return zlib.NewReaderDict(r, dict) },
-	}
-}
-
-type genericCompression struct {
-	wf func(w io.Writer) (io.WriteCloser, error)
-	rf func(r io.Reader) (io.ReadCloser, error)
-}
-
-func (g *genericCompression) Writer(dst io.Writer) (io.WriteCloser, error) {
-	return g.wf(dst)
-}
-
-func (g *genericCompression) Reader(src io.Reader) (io.ReadCloser, error) {
-	return g.rf(src)
-}