chore: build with Go 1.26; use Go 1.25 features (#10570)

WaitGroup.Go and built-in gomaxprocs handling.

Signed-off-by: Jakob Borg <jakob@kastelo.net>

cmd/dev/stcompdirs/main.go

@@ -15,8 +15,6 @@ import (
 	"log"
 	"os"
 	"path/filepath"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {

cmd/dev/stdisco/main.go

@@ -18,7 +18,6 @@ import (
 	"google.golang.org/protobuf/proto"
 
 	"github.com/syncthing/syncthing/internal/gen/discoproto"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/beacon"
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/protocol"

cmd/dev/stevents/main.go

@@ -14,8 +14,6 @@ import (
 	"net/http"
 	"os"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 type event struct {

cmd/dev/stfileinfo/main.go

@@ -13,7 +13,6 @@ import (
 	"os"
 	"path/filepath"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/scanner"
 )

cmd/dev/stfinddevice/main.go

@@ -16,7 +16,6 @@ import (
 	"os"
 	"time"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/events"

cmd/dev/stfindignored/main.go

@@ -12,7 +12,6 @@ import (
 	"fmt"
 	"os"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/ignore"
 )

cmd/dev/stgenfiles/main.go

@@ -15,8 +15,6 @@ import (
 	"os"
 	"path/filepath"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {

cmd/dev/stsigtool/main.go

@@ -12,7 +12,6 @@ import (
 	"log"
 	"os"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/signature"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )

cmd/dev/stvanity/main.go

@@ -26,7 +26,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
@@ -53,11 +52,9 @@ func main() {
 	// Run one certificate generator per CPU core.
 	var wg sync.WaitGroup
 	for i := 0; i < runtime.GOMAXPROCS(-1); i++ {
-		wg.Add(1)
-		go func() {
+		wg.Go(func() {
 			generatePrefixed(prefix, &count, found, stop)
-			wg.Done()
-		}()
+		})
 	}
 
 	// Save the result, when one has been found.

cmd/dev/stwatchfile/main.go

@@ -13,8 +13,6 @@ import (
 	"io"
 	"os"
 	"time"
-
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 func main() {