diff --git a/src/tools.rs b/src/tools.rs
index 2a0f7a5ff..3f2d23d1e 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -670,16 +670,6 @@ pub(crate) fn parse_receive_headers(headers: &Headers) -> String {
         .join("\n")
 }
 
-pub(crate) fn single_value<T>(collection: impl IntoIterator<Item = T>) -> Option<T> {
-    let mut iter = collection.into_iter();
-    if let Some(value) = iter.next() {
-        if iter.next().is_none() {
-            return Some(value);
-        }
-    }
-    None
-}
-
 #[cfg(test)]
 mod tests {
     #![allow(clippy::indexing_slicing)]