add final missed dep

Author: yoshuawuyts

Cargo.toml

@@ -45,7 +45,6 @@ serde_qs = "0.5.0"
 [dev-dependencies]
 async-std = { version = "1.4.0", features = ["unstable", "attributes"] }
 femme = "1.3.0"
-http-service-mock = "0.5.0"
 juniper = "0.14.1"
 portpicker = "0.1.0"
 serde = { version = "1.0.102", features = ["derive"] }