update include isntructions

docs/content/developer/iota-identity/getting-started/rust.mdx

@@ -20,19 +20,6 @@ tags:
 
 To include IOTA Identity in your project, add it as a dependency in your `Cargo.toml`:
 
-### Latest Stable Release
-
-This version is published to crates.io and is **stable**, following semantic versioning.
-
-```toml
-[dependencies]
-identity_iota = { version = "1.4.0" }
-```
-
-### Development Release
-
-This version matches the `main` branch of this repository. It has all the **latest features**, but as such, it **may also have undocumented breaking changes**.
-
 ```toml
 [dependencies]
 identity_iota = { git = "https://github.com/iotaledger/identity.rs", tag = "v1.6.0-alpha"}