Remove unused findLevel function (#3628)

pkg/log/level.go

@@ -1,9 +1,6 @@
 package log
 
 import (
-	"sort"
-
-	"github.com/go-logr/logr"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -32,12 +29,3 @@ func SetLevelForControl(control levelSetter, level int8) {
 	// For example setting the level to -2 below, means log.V(2) will be enabled.
 	control.SetLevel(zapcore.Level(-level))
 }
-
-// findLevel probes a logr.Logger to figure out what level it is at via binary
-// search. We only search [0, 128), so worst case is ~7 checks.
-func findLevel(logger logr.Logger) int8 {
-	sink := logger.GetSink()
-	return int8(sort.Search(128, func(i int) bool {
-		return !sink.Enabled(i)
-	}) - 1)
-}

pkg/log/log_test.go

@@ -224,17 +224,6 @@ func splitLines(s string) []string {
 	return logLines
 }
 
-func TestFindLevel(t *testing.T) {
-	lvl := zap.NewAtomicLevel()
-	logger, _ := New("parent", WithConsoleSink(io.Discard, WithLeveler(lvl)))
-
-	for i := 0; i < 128; i++ {
-		i8 := int8(i)
-		SetLevelForControl(lvl, i8)
-		assert.Equal(t, i8, findLevel(logger))
-	}
-}
-
 func TestGlobalRedaction_Console(t *testing.T) {
 	oldState := globalRedactor
 	globalRedactor = &dynamicRedactor{