Remove unstable and test feature flags

core/Cargo.toml

@@ -18,8 +18,6 @@ chacha = []
 cuda = []
 erasure = []
 ipv6 = ["solana-netutil/ipv6"]
-test = []
-unstable = []
 
 [dependencies]
 bincode = "1.1.2"

core/src/lib.rs

@@ -6,7 +6,6 @@
 //! (see [ThinClient](thin_client/struct.ThinClient.html)) to interact with them.
 //!
 
-#![cfg_attr(feature = "unstable", feature(test))]
 pub mod bank_forks;
 pub mod banking_stage;
 pub mod blob_fetch_stage;