diff --git a/common/src/error.rs b/common/src/error.rs
index 825eb7e..f8a3e3e 100644
--- a/common/src/error.rs
+++ b/common/src/error.rs
@@ -51,9 +51,3 @@ pub enum ExecutionFailureKind {
     InsufficientFundsError,
 }
 
-#[derive(Debug, thiserror::Error)]
-pub enum TransactionSignatureError {
-    #[error("invalid signature for transaction body")]
-    InvalidSignature,
-}
-