lib: Use counterfeiter to mock interfaces in tests (#7375)

lib/testutils/testutils.go

@@ -8,9 +8,7 @@ package testutils
 
 import (
 	"errors"
-	"net"
 	"sync"
-	"time"
 )
 
 var ErrClosed = errors.New("closed")
@@ -60,47 +58,3 @@ type NoopCloser struct{}
 func (NoopCloser) Close() error {
 	return nil
 }
-
-// FakeConnectionInfo implements the methods of protocol.Connection that are
-// not implemented by protocol.Connection
-type FakeConnectionInfo struct {
-	Name string
-}
-
-func (f *FakeConnectionInfo) RemoteAddr() net.Addr {
-	return &FakeAddr{}
-}
-
-func (f *FakeConnectionInfo) Type() string {
-	return "fake"
-}
-
-func (f *FakeConnectionInfo) Crypto() string {
-	return "fake"
-}
-
-func (f *FakeConnectionInfo) Transport() string {
-	return "fake"
-}
-
-func (f *FakeConnectionInfo) Priority() int {
-	return 9000
-}
-
-func (f *FakeConnectionInfo) String() string {
-	return ""
-}
-
-func (f *FakeConnectionInfo) EstablishedAt() time.Time {
-	return time.Time{}
-}
-
-type FakeAddr struct{}
-
-func (FakeAddr) Network() string {
-	return "network"
-}
-
-func (FakeAddr) String() string {
-	return "address"
-}