diff --git a/src/time/format.go b/src/time/format.go
index 8bc1c30592..87e990d48a 100644
--- a/src/time/format.go
+++ b/src/time/format.go
@@ -891,8 +891,6 @@ func quote(s string) string {
 			if c == '"' || c == '\\' {
 				buf = append(buf, '\\')
 			}
-			// Since c < runeSelf && c >= ' ' (i.e., 32 <= c < 128),
-			// `byte(c)` is used for better performance.
 			buf = append(buf, byte(c))
 		}
 	}