all: Remove miscellaneous vestigial code (#7495)

lib/api/api.go

@@ -23,7 +23,6 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
-	"regexp"
 	"runtime"
 	"runtime/pprof"
 	"sort"
@@ -60,9 +59,6 @@ import (
 	"github.com/syncthing/syncthing/lib/ur"
 )
 
-// matches a bcrypt hash and not too much else
-var bcryptExpr = regexp.MustCompile(`^\$2[aby]\$\d+\$.{50,}`)
-
 const (
 	DefaultEventMask      = events.AllEvents &^ events.LocalChangeDetected &^ events.RemoteChangeDetected
 	DiskEventMask         = events.LocalChangeDetected | events.RemoteChangeDetected

lib/connections/quic_dial.go

@@ -90,10 +90,7 @@ func (d *quicDialer) Dial(ctx context.Context, _ protocol.DeviceID, uri *url.URL
 	return newInternalConn(&quicTlsConn{session, stream, createdConn}, connTypeQUICClient, quicPriority), nil
 }
 
-type quicDialerFactory struct {
-	cfg    config.Wrapper
-	tlsCfg *tls.Config
-}
+type quicDialerFactory struct{}
 
 func (quicDialerFactory) New(opts config.OptionsConfiguration, tlsCfg *tls.Config) genericDialer {
 	return &quicDialer{commonDialer{

lib/db/benchmark_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
-var files, filesUpdated, oneFile, firstHalf, secondHalf, changed100, unchanged100 []protocol.FileInfo
+var files, oneFile, firstHalf, secondHalf, changed100, unchanged100 []protocol.FileInfo
 
 func lazyInitBenchFiles() {
 	if files != nil {

lib/db/schemaupdater.go

@@ -8,7 +8,6 @@ package db
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"sort"
 	"strings"
@@ -32,8 +31,6 @@ type migration struct {
 	migration           func(prevSchema int) error
 }
 
-var errFolderMissing = errors.New("folder present in global list but missing in keyer index")
-
 type databaseDowngradeError struct {
 	minSyncthingVersion string
 }

lib/db/structs.go

@@ -396,25 +396,6 @@ func (vl *VersionList) findDevice(device []byte) (bool, int, int, bool) {
 	return false, -1, -1, false
 }
 
-func (vl *VersionList) popVersion(version protocol.Vector) (FileVersion, bool) {
-	i := vl.versionIndex(version)
-	if i == -1 {
-		return FileVersion{}, false
-	}
-	fv := vl.RawVersions[i]
-	vl.popVersionAt(i)
-	return fv, true
-}
-
-func (vl *VersionList) versionIndex(version protocol.Vector) int {
-	for i, v := range vl.RawVersions {
-		if version.Equal(v.Version) {
-			return i
-		}
-	}
-	return -1
-}
-
 func (vl *VersionList) popVersionAt(i int) {
 	vl.RawVersions = append(vl.RawVersions[:i], vl.RawVersions[i+1:]...)
 }
@@ -496,14 +477,6 @@ func popDeviceAt(devices [][]byte, i int) [][]byte {
 	return append(devices[:i], devices[i+1:]...)
 }
 
-func popDevice(devices [][]byte, device []byte) ([][]byte, bool) {
-	i := deviceIndex(devices, device)
-	if i == -1 {
-		return devices, false
-	}
-	return popDeviceAt(devices, i), true
-}
-
 func newFileVersion(device []byte, version protocol.Vector, invalid, deleted bool) FileVersion {
 	fv := FileVersion{
 		Version: version,

lib/events/events.go

@@ -237,7 +237,6 @@ type logger struct {
 	events              chan Event
 	funcs               chan func(context.Context)
 	toUnsubscribe       chan *subscription
-	stop                chan struct{}
 }
 
 type Event struct {

lib/model/blockpullreorderer_test.go

@@ -7,10 +7,11 @@
 package model
 
 import (
-	"github.com/syncthing/syncthing/lib/protocol"
 	"reflect"
 	"sort"
 	"testing"
+
+	"github.com/syncthing/syncthing/lib/protocol"
 )
 
 var (
@@ -46,9 +47,6 @@ func Test_chunk(t *testing.T) {
 }
 
 func Test_inOrderBlockPullReorderer_Reorder(t *testing.T) {
-	type args struct {
-		blocks []protocol.BlockInfo
-	}
 	tests := []struct {
 		name   string
 		blocks []protocol.BlockInfo

lib/model/indexsender.go

@@ -25,7 +25,6 @@ type indexSender struct {
 	conn                     protocol.Connection
 	folder                   string
 	folderIsReceiveEncrypted bool
-	dev                      string
 	fset                     *db.FileSet
 	prevSequence             int64
 	evLogger                 events.Logger

lib/model/model.go

@@ -184,7 +184,6 @@ var (
 	errNetworkNotAllowed = errors.New("network not allowed")
 	errNoVersioner       = errors.New("folder has no versioner")
 	// errors about why a connection is closed
-	errIgnoredFolderRemoved            = errors.New("folder no longer ignored")
 	errReplacingConnection             = errors.New("replacing connection")
 	errStopped                         = errors.New("Syncthing is being stopped")
 	errEncryptionInvConfigLocal        = errors.New("can't encrypt data for a device when the folder type is receiveEncrypted")
@@ -1701,15 +1700,6 @@ func (m *model) handleAutoAccepts(deviceID protocol.DeviceID, folder protocol.Fo
 	}
 }
 
-func (m *model) newFolderConfiguration(id, label string, fsType fs.FilesystemType, path string) config.FolderConfiguration {
-	fcfg := m.cfg.DefaultFolder()
-	fcfg.ID = id
-	fcfg.Label = label
-	fcfg.FilesystemType = fsType
-	fcfg.Path = path
-	return fcfg
-}
-
 func (m *model) introduceDevice(device protocol.Device, introducerCfg config.DeviceConfiguration) config.DeviceConfiguration {
 	addresses := []string{"dynamic"}
 	for _, addr := range device.Addresses {

lib/ur/usage_report.go

@@ -426,6 +426,11 @@ func CpuBench(ctx context.Context, iterations int, duration time.Duration, useWe
 			perf = v
 		}
 	}
+	if blocksResult == nil {
+		// not looking at the blocksResult makes it unused from a static
+		// analysis / compiler standpoint...
+		panic("blocksResult should have been set by benchmark loop")
+	}
 	blocksResult = nil
 	return perf
 }