build(chain): remove serde_json dependency

Author: nymius

crates/chain/Cargo.toml

@@ -23,7 +23,6 @@ miniscript = { version = "12.0.0", optional = true, default-features = false }
 
 # Feature dependencies
 rusqlite = { version = "0.31.0", features = ["bundled"], optional = true }
-serde_json = { version = "1", optional = true }
 
 [dev-dependencies]
 rand = "0.8"
@@ -36,4 +35,4 @@ default = ["std", "miniscript"]
 std = ["bitcoin/std", "miniscript?/std", "bdk_core/std"]
 serde = ["dep:serde", "bitcoin/serde", "miniscript?/serde", "bdk_core/serde"]
 hashbrown = ["bdk_core/hashbrown"]
-rusqlite = ["std", "dep:rusqlite", "serde", "serde_json"]
+rusqlite = ["std", "dep:rusqlite", "serde"]