diff --git a/src/uu/tr/src/operation.rs b/src/uu/tr/src/operation.rs
index 14561b1de..77ace6b40 100644
--- a/src/uu/tr/src/operation.rs
+++ b/src/uu/tr/src/operation.rs
@@ -122,7 +122,6 @@ impl Sequence {
     }
 
     // Hide all the nasty sh*t in here
-    // TODO: Make the 2 set lazily generate the character mapping as necessary.
     pub fn solve_set_characters(
         set1_str: &[u8],
         set2_str: &[u8],