access-control: cleanup comment in Cargo.toml

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

proxmox-access-control/Cargo.toml

@@ -10,8 +10,6 @@ exclude.workspace = true
 rust-version.workspace = true
 description = "A collection of utilities to implement access control management."
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
 anyhow.workspace = true
 nix = { workspace = true, optional = true }