depend-o-pocalipse (#9450)

Remove unneeded dependencies and dev-dependencies.
Made self_destruct test not dependent on wasm bin size.  
Updated code related to deprecated warning on tracing-subscriber `scope()` 
( See https://github.com/tokio-rs/tracing/issues/1429 )

substrate/primitives/rpc/Cargo.toml

@@ -15,7 +15,6 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 serde = { version = "1.0.126", features = ["derive"] }
 sp-core = { version = "4.0.0-dev", path = "../core" }
-tracing-core = "0.1.17"
 rustc-hash = "1.1.0"
 
 [dev-dependencies]