lntemp+itest: remove unused code to prepare lntemp's takeover

This commit removes the old code living in `lntest` to prepare
`lntemp`'s takeover.

lntest/fee_service.go

@@ -1,114 +0,0 @@
-package lntest
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"sync"
-	"testing"
-
-	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
-)
-
-const (
-	// feeServiceTarget is the confirmation target for which a fee estimate
-	// is returned. Requests for higher confirmation targets will fall back
-	// to this.
-	feeServiceTarget = 1
-)
-
-// feeService runs a web service that provides fee estimation information.
-type feeService struct {
-	feeEstimates
-
-	t *testing.T
-
-	srv *http.Server
-	wg  sync.WaitGroup
-
-	url string
-
-	lock sync.Mutex
-}
-
-// feeEstimates contains the current fee estimates.
-type feeEstimates struct {
-	Fees map[uint32]uint32 `json:"fee_by_block_target"`
-}
-
-// startFeeService spins up a go-routine to serve fee estimates.
-func startFeeService(t *testing.T) *feeService {
-	port := NextAvailablePort()
-	f := feeService{
-		t:   t,
-		url: fmt.Sprintf("http://localhost:%v/fee-estimates.json", port),
-	}
-
-	// Initialize default fee estimate.
-	f.Fees = map[uint32]uint32{feeServiceTarget: 50000}
-
-	listenAddr := fmt.Sprintf(":%v", port)
-	mux := http.NewServeMux()
-	mux.HandleFunc("/fee-estimates.json", f.handleRequest)
-
-	f.srv = &http.Server{
-		Addr:    listenAddr,
-		Handler: mux,
-	}
-
-	f.wg.Add(1)
-	go func() {
-		defer f.wg.Done()
-
-		if err := f.srv.ListenAndServe(); err != http.ErrServerClosed {
-			f.t.Errorf("error: cannot start fee api: %v", err)
-		}
-	}()
-
-	return &f
-}
-
-// handleRequest handles a client request for fee estimates.
-func (f *feeService) handleRequest(w http.ResponseWriter, r *http.Request) {
-	f.lock.Lock()
-	defer f.lock.Unlock()
-
-	bytes, err := json.Marshal(f.feeEstimates)
-	if err != nil {
-		f.t.Errorf("error: cannot serialize estimates: %v", err)
-
-		return
-	}
-
-	_, err = io.WriteString(w, string(bytes))
-	if err != nil {
-		f.t.Errorf("error: cannot send estimates: %v", err)
-	}
-}
-
-// stop stops the web server.
-func (f *feeService) stop() {
-	if err := f.srv.Shutdown(context.Background()); err != nil {
-		f.t.Errorf("error: cannot stop fee api: %v", err)
-	}
-
-	f.wg.Wait()
-}
-
-// setFee changes the current fee estimate for the fixed confirmation target.
-func (f *feeService) setFee(fee chainfee.SatPerKWeight) {
-	f.lock.Lock()
-	defer f.lock.Unlock()
-
-	f.Fees[feeServiceTarget] = uint32(fee.FeePerKVByte())
-}
-
-// setFeeWithConf sets a fee for the given confirmation target.
-func (f *feeService) setFeeWithConf(fee chainfee.SatPerKWeight, conf uint32) {
-	f.lock.Lock()
-	defer f.lock.Unlock()
-
-	f.Fees[conf] = uint32(fee.FeePerKVByte())
-}