examples/spl: Remove derive feature

examples/spl/token-proxy/programs/token-proxy/Cargo.toml

@@ -14,7 +14,7 @@ cpi = ["no-entrypoint"]
 
 [dependencies]
 anchor-lang = { git = "https://github.com/project-serum/anchor", features = ["derive"] }
-anchor-spl = { git = "https://github.com/project-serum/anchor", features = ["derive"] }
+anchor-spl = { git = "https://github.com/project-serum/anchor" }
 serum-borsh = { version = "0.8.0-serum.1", features = ["serum-program"] }
 solana-program = "1.4.3"
 solana-sdk = { version = "1.3.14", default-features = false, features = ["program"] }