chore: remove unused codec in dependency list

Author: mateusfigmelo

Cargo.lock

@@ -11,7 +11,6 @@ repository = "https://github.com/opentensor/subtensor/"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-codec = { workspace = true, features = ["derive"] }
 ed25519-dalek = { workspace = true, features = ["alloc"] }
 fp-evm.workspace = true
 frame-support.workspace = true
@@ -44,7 +43,6 @@ workspace = true
 [features]
 default = ["std"]
 std = [
-	"codec/std",
 	"ed25519-dalek/std",
 	"fp-evm/std",
 	"frame-support/std",