diff -r c7fb9b74e753 -r 29cf3167e459 rust/hg-core/src/utils.rs
--- a/rust/hg-core/src/utils.rs	Mon Nov 14 15:20:48 2022 +0100
+++ b/rust/hg-core/src/utils.rs	Mon Nov 14 15:29:58 2022 +0100
@@ -145,21 +145,6 @@
     }
 }
 
-pub trait StrExt {
-    // TODO: Use https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_once
-    // once we require Rust 1.52+
-    fn split_2(&self, separator: char) -> Option<(&str, &str)>;
-}
-
-impl StrExt for str {
-    fn split_2(&self, separator: char) -> Option<(&str, &str)> {
-        let mut iter = self.splitn(2, separator);
-        let a = iter.next()?;
-        let b = iter.next()?;
-        Some((a, b))
-    }
-}
-
 pub trait Escaped {
     /// Return bytes escaped for display to the user
     fn escaped_bytes(&self) -> Vec<u8>;