Add a dummy implementation of proxyutil.LineBuffer

Rather than actually assembling all of the rules we aren't going to
use, just count them and throw them away.

pkg/proxy/util/utils.go

@@ -17,7 +17,6 @@ limitations under the License.
 package util
 
 import (
-	"bytes"
 	"context"
 	"fmt"
 	"net"
@@ -321,67 +320,6 @@ func GetClusterIPByFamily(ipFamily v1.IPFamily, service *v1.Service) string {
 	return ""
 }
 
-type LineBuffer struct {
-	b     bytes.Buffer
-	lines int
-}
-
-// Write takes a list of arguments, each a string or []string, joins all the
-// individual strings with spaces, terminates with newline, and writes to buf.
-// Any other argument type will panic.
-func (buf *LineBuffer) Write(args ...interface{}) {
-	for i, arg := range args {
-		if i > 0 {
-			buf.b.WriteByte(' ')
-		}
-		switch x := arg.(type) {
-		case string:
-			buf.b.WriteString(x)
-		case []string:
-			for j, s := range x {
-				if j > 0 {
-					buf.b.WriteByte(' ')
-				}
-				buf.b.WriteString(s)
-			}
-		default:
-			panic(fmt.Sprintf("unknown argument type: %T", x))
-		}
-	}
-	buf.b.WriteByte('\n')
-	buf.lines++
-}
-
-// WriteBytes writes bytes to buffer, and terminates with newline.
-func (buf *LineBuffer) WriteBytes(bytes []byte) {
-	buf.b.Write(bytes)
-	buf.b.WriteByte('\n')
-	buf.lines++
-}
-
-// Reset clears buf
-func (buf *LineBuffer) Reset() {
-	buf.b.Reset()
-	buf.lines = 0
-}
-
-// Bytes returns the contents of buf as a []byte
-func (buf *LineBuffer) Bytes() []byte {
-	return buf.b.Bytes()
-}
-
-// String returns the contents of buf as a string
-func (buf *LineBuffer) String() string {
-	return buf.b.String()
-}
-
-// Lines returns the number of lines in buf. Note that more precisely, this returns the
-// number of times Write() or WriteBytes() was called; it assumes that you never wrote
-// any newlines to the buffer yourself.
-func (buf *LineBuffer) Lines() int {
-	return buf.lines
-}
-
 // RevertPorts is closing ports in replacementPortsMap but not in originalPortsMap. In other words, it only
 // closes the ports opened in this sync.
 func RevertPorts(replacementPortsMap, originalPortsMap map[netutils.LocalPort]netutils.Closeable) {