build: shear unused dependencies

src/core/Cargo.toml

@@ -79,7 +79,6 @@ futures.workspace = true
 http-body-util.workspace = true
 http.workspace = true
 ipaddress.workspace = true
-itertools.workspace = true
 libc.workspace = true
 libloading.workspace = true
 libloading.optional = true
@@ -92,7 +91,6 @@ rand_core = { version = "0.6.4", features = ["getrandom"] }
 regex.workspace = true
 reqwest.workspace = true
 sha2.workspace = true
-assign.workspace = true
 ruma.workspace = true
 sanitize-filename.workspace = true
 serde_json.workspace = true