diff --git a/functions.qmd b/functions.qmd
index 0418432..1dfc9cd 100644
--- a/functions.qmd
+++ b/functions.qmd
@@ -871,5 +871,4 @@ A few places to learn more are:
 -   To learn more about reducing duplication in your ggplot2 code, read the [Programming with ggplot2](https://ggplot2-book.org/programming.html){.uri} chapter of the ggplot2 book.
 -   For more advice on function style, see the [tidyverse style guide](https://style.tidyverse.org/functions.html){.uri}.
 
-In the next chapter, we'll dive into some of the details of R's vector data structures that we've omitted so far.
-These are not immediately useful by themselves, but are a necessary foundation for the following chapter on iteration which gives you further tools for reducing code duplication.
+In the next chapter, we'll dive into iteration which gives you further tools for reducing code duplication.