Revert change to serde per @thiolliere

Author: danforbes

bin/node-template/runtime/Cargo.toml

@@ -23,7 +23,7 @@ system = { version = "2.0.0-rc5", default-features = false, package = "frame-sys
 timestamp = { version = "2.0.0-rc5", default-features = false, package = "pallet-timestamp", path = "../../../frame/timestamp" }
 transaction-payment = { version = "2.0.0-rc5", default-features = false, package = "pallet-transaction-payment", path = "../../../frame/transaction-payment" }
 frame-executive = { version = "2.0.0-rc5", default-features = false, path = "../../../frame/executive" }
-serde = { version = "1.0.101", default-features = false, optional = true, features = ["derive"] }
+serde = { version = "1.0.101", optional = true, features = ["derive"] }
 sp-api = { version = "2.0.0-rc5", default-features = false, path = "../../../primitives/api" }
 sp-block-builder = { path = "../../../primitives/block-builder", default-features = false, version = "2.0.0-rc5"}
 sp-consensus-aura = { version = "0.8.0-rc5", default-features = false, path = "../../../primitives/consensus/aura" }
@@ -51,7 +51,7 @@ std = [
 	"frame-support/std",
 	"grandpa/std",
 	"randomness-collective-flip/std",
-	"serde/std",
+	"serde",
 	"sp-api/std",
 	"sp-block-builder/std",
 	"sp-consensus-aura/std",