diff --git a/crypto/ed25519/internal/r2ishiguro/testutil/prove.go~ b/crypto/ed25519/internal/r2ishiguro/testutil/prove.go~
deleted file mode 100644
index 110b2e6a7..000000000
--- a/crypto/ed25519/internal/r2ishiguro/testutil/prove.go~
+++ /dev/null
@@ -1 +0,0 @@
-package testutil