chore: remove unparam deprecated option

Author: ldez

pkg/config/linters_settings.go

@@ -152,9 +152,6 @@ var defaultLintersSettings = LintersSettings{
 		SkipRegexp:    `(export|internal)_test\.go`,
 		AllowPackages: []string{"main"},
 	},
-	Unparam: UnparamSettings{
-		Algo: "cha",
-	},
 	Unused: UnusedSettings{
 		FieldWritesAreUses:     true,
 		PostStatementsAreReads: false,

pkg/golinters/unparam/unparam.go

@@ -8,7 +8,6 @@ import (
 
 	"github.com/golangci/golangci-lint/pkg/config"
 	"github.com/golangci/golangci-lint/pkg/goanalysis"
-	"github.com/golangci/golangci-lint/pkg/lint/linter"
 )
 
 const linterName = "unparam"
@@ -33,11 +32,7 @@ func New(settings *config.UnparamSettings) *goanalysis.Linter {
 		"Reports unused function parameters",
 		[]*analysis.Analyzer{analyzer},
 		nil,
-	).WithContextSetter(func(lintCtx *linter.Context) {
-		if settings.Algo != "cha" { // TODO(ldez): is it deprecated? Remove?
-			lintCtx.Log.Warnf("`linters.settings.unparam.algo` isn't supported by the newest `unparam`")
-		}
-	}).WithLoadMode(goanalysis.LoadModeTypesInfo)
+	).WithLoadMode(goanalysis.LoadModeTypesInfo)
 }
 
 func runUnparam(pass *analysis.Pass, settings *config.UnparamSettings) error {