drop unused serde_qs dependency

Signed-off-by: Marc-Antoine Perennou <[email protected]>

Author: Keruspe

Cargo.toml

@@ -41,7 +41,6 @@ kv-log-macro = "1.0.4"
 route-recognizer = "0.1.13"
 serde = "1.0.102"
 serde_json = "1.0.41"
-serde_qs = "0.5.0"
 
 [dev-dependencies]
 async-std = { version = "1.6.0", features = ["unstable", "attributes"] }