diff --git a/check_diff/src/lib.rs b/check_diff/src/lib.rs
index 80f5d1803a1..90dbd5cc729 100644
--- a/check_diff/src/lib.rs
+++ b/check_diff/src/lib.rs
@@ -22,9 +22,6 @@ pub enum CheckDiffError {
     FailedBinaryVersioning(PathBuf),
     /// Error when obtaining cargo version
     FailedCargoVersion(&'static str),
-    /// Error when trying to find rust files
-    FailedFindingRustFiles(&'static str),
-    FailedWritingToFile(&'static str),
     IO(std::io::Error),
 }