diff --git a/proxmox-lang/src/lib.rs b/proxmox-lang/src/lib.rs
index dafa92b5..230302e0 100644
--- a/proxmox-lang/src/lib.rs
+++ b/proxmox-lang/src/lib.rs
@@ -109,31 +109,3 @@ macro_rules! c_str {
         unsafe { ::std::ffi::CStr::from_bytes_with_nul_unchecked(concat!($data, "\0").as_bytes()) }
     }};
 }
-
-/*
-// With rust 1.56 we can enable the `c_str!()` macro for const fns:
-
-#[doc(hidden)]
-#[allow(unconditional_panic)]
-pub const fn illegal_c_string() {
-    [][0]
-}
-
-/// Assert that a static byte slice is a valid C string (has no zeros except at the very end),
-/// and return it as a `&'static CStr`.
-pub const fn checked_c_str(bytes: &'static [u8]) -> &'static std::ffi::CStr {
-    let mut i = 0;
-    while i < bytes.len() - 1 {
-        if bytes[i] == 0 {
-            illegal_c_string();
-        }
-        i += 1;
-    }
-    unsafe { std::mem::transmute::<_, &'static std::ffi::CStr>(bytes) }
-}
-
-#[macro_export]
-macro_rules! c_str {
-    ($data:expr) => { $crate::checked_c_str(concat!($data, "\0")) };
-}
-*/