dep: remove unused deps

Author: josh-tracey

Cargo.lock

@@ -15,10 +15,5 @@ keywords = ["expression", "eval", "js-expression", "js-eval", "javascript"]
 anyhow = "~1"
 rslint_parser = "=0.3.1"
 serde_json = "~1"
-serde_json_ctx = { version = "0.1.0", optional = true }
 thiserror = "~1"
 tracing = "0.1.41"
-
-[features]
-default = ["serde_json_ctx"]
-serde_json_ctx = ["dep:serde_json_ctx"]