Remove v30 SDK type names migration entry

soroban-sdk/src/_migrating.rs

@@ -14,9 +14,6 @@
 //!   SDK on an existing contract that has duplicate names, you can expect to see the contract spec
 //!   change.
 //!
-//! - [It is now an error to name types, events, and errors with type names that are already used
-//!   by types within the soroban-sdk][v30_sdk_type_names].
-//!
 //! - Integer enums defined with [`contracttype`] can no longer be passed to [`panic_with_error!`]
 //!   or [`Env::panic_with_error`]. Their support was accidental. Only [`contracterror`] types are
 //!   intended to be used with [`panic_with_error!`].
@@ -34,7 +31,6 @@
 //! [v30_cli_version]: v30_cli_version
 //! [v30_duplicate_names]: v30_duplicate_names
 //! [v30_muxed_contracts]: v30_muxed_contracts
-//! [v30_sdk_type_names]: v30_sdk_type_names
 //! [v30_spec_markers]: v30_spec_markers
 //! [`panic_with_error!`]: crate::panic_with_error
 //! [`Env::panic_with_error`]: crate::Env::panic_with_error
@@ -493,5 +489,4 @@ pub mod v28_spec_shaking;
 pub mod v30_cli_version;
 pub mod v30_duplicate_names;
 pub mod v30_muxed_contracts;
-pub mod v30_sdk_type_names;
 pub mod v30_spec_markers;