cmd: simplify

src/cmd/compile/internal/pgo/irgraph.go

@@ -380,7 +380,7 @@ func (p *Profile) PrintWeightedCallGraphDOT(edgeThreshold float64) {
 
 	// Determine nodes of DOT.
 	nodes := make(map[string]*ir.Func)
-	for name, _ := range funcs {
+	for name := range funcs {
 		if n, ok := p.WeightedCG.IRNodes[name]; ok {
 			for _, e := range p.WeightedCG.OutEdges[n] {
 				if _, ok := nodes[ir.PkgFuncName(e.Src.AST)]; !ok {

src/cmd/go/internal/modload/edit.go

@@ -397,7 +397,7 @@ func selectPotentiallyImportedModules(ctx context.Context, limiter *versionLimit
 		return nil, false, err
 	}
 	mods = make([]module.Version, 0, len(limiter.selected))
-	for path, _ := range limiter.selected {
+	for path := range limiter.selected {
 		if !MainModules.Contains(path) {
 			if v := mg.Selected(path); v != "none" {
 				mods = append(mods, module.Version{Path: path, Version: v})

src/cmd/trace/trace.go

@@ -338,7 +338,7 @@ func stackFrameEncodedSize(id uint, f traceviewer.Frame) int {
 	// The parent is omitted if 0. The trailing comma is omitted from the
 	// last entry, but we don't need that much precision.
 	const (
-		baseSize = len(`"`) + len (`":{"name":"`) + len(`"},`)
+		baseSize = len(`"`) + len(`":{"name":"`) + len(`"},`)
 
 		// Don't count the trailing quote on the name, as that is
 		// counted in baseSize.