[minor] Delete outdated TODO comment (#17565)

Summary
--

Delete a TODO I left that was handled in the last minor release
(#16125).

Test Plan
--

N/a

crates/ruff/tests/lint.rs

@@ -5175,8 +5175,8 @@ fn a005_module_shadowing_non_strict() -> Result<()> {
 }
 
 /// Test A005 with `strict-checking` unset
-/// TODO(brent) This should currently match the strict version, but after the next minor
-/// release it will match the non-strict version directly above
+///
+/// This should match the non-strict version directly above
 #[test]
 fn a005_module_shadowing_strict_default() -> Result<()> {
     let tempdir = TempDir::new()?;