cleanup: remove unused function `IndexRune`

helpers.go

@@ -728,15 +728,6 @@ func IsMethodIdempotent(m string) bool {
 	}
 }
 
-func IndexRune(str string, needle int32) bool {
-	for _, b := range str {
-		if b == needle {
-			return true
-		}
-	}
-	return false
-}
-
 // Convert a string value to a specified type, handling errors and optional default values.
 func Convert[T any](value string, convertor func(string) (T, error), defaultValue ...T) (T, error) {
 	converted, err := convertor(value)

helpers_test.go

@@ -625,13 +625,13 @@ func Benchmark_SlashRecognition(b *testing.B) {
 		}
 		require.True(b, result)
 	})
-	b.Run("IndexRune", func(b *testing.B) {
+	b.Run("strings.ContainsRune", func(b *testing.B) {
 		b.ReportAllocs()
 		b.ResetTimer()
 		result = false
 		c := int32(slashDelimiter)
 		for i := 0; i < b.N; i++ {
-			result = IndexRune(search, c)
+			result = strings.ContainsRune(search, c)
 		}
 		require.True(b, result)
 	})