[guide] clean up confusing example from bad rebase

ljharb · ljharb · commit 295d1e61cbeb · 2019-08-14T08:46:21.000-07:00
... from airbnb@820745d#diff-04c6e90faac2675aa89e2176d2eec7d8R963-R965 / airbnb#1863. Fixes airbnb#2071.
diff --git a/README.md b/README.md
@@ -960,9 +960,6 @@ Other Style Guides
       `A string containing the ${nextNumber}.`;
     });
 
-    // bad
-    [1, 2, 3].map((number) => `A string containing the ${number}.`);
-
     // good
     [1, 2, 3].map((number) => `A string containing the ${number + 1}.`);
 
