Delete legacy runtime metadata macros (paritytech#9043)

Author: ascjones

frame/support/src/lib.rs

@@ -46,6 +46,8 @@ pub use sp_io::{storage::root as storage_root, self};
 pub use sp_runtime::RuntimeDebug;
 #[doc(hidden)]
 pub use log;
+#[doc(hidden)]
+pub use frame_metadata as metadata;
 
 #[macro_use]
 mod origin;
@@ -56,8 +58,6 @@ mod hash;
 #[macro_use]
 pub mod event;
 #[macro_use]
-pub mod metadata;
-#[macro_use]
 pub mod genesis_config;
 #[macro_use]
 pub mod inherent;