Manually implement `Zeroize`

Removes dependence on proc-macros when enabling the zeroize feature.

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 3235400..41bb1ff 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -103,7 +103,7 @@ digest = { version = "0.10.1", features = [ "mac" ], optional = true }
 memmap2 = { version = "0.9", optional = true }
 rayon-core = { version = "1.12.1", optional = true }
 serde = { version = "1.0", default-features = false, features = ["derive"], optional = true }
-zeroize = { version = "1", default-features = false, features = ["zeroize_derive"], optional = true }
+zeroize = { version = "1", default-features = false, optional = true }
 
 [dev-dependencies]
 hmac = "0.12.0"