Check for unused deps in CI (#1262)

* Check for unused deps in CI

* Bump slashing protection parking_lot version

beacon_node/Cargo.toml

@@ -29,7 +29,6 @@ slog-async = "2.5.0"
 ctrlc = { version = "3.1.4", features = ["termination"] }
 tokio = { version = "0.2.21", features = ["time"] }
 exit-future = "0.2.0"
-env_logger = "0.7.1"
 dirs = "2.0.2"
 logging = { path = "../common/logging" }
 futures = "0.3.5"

beacon_node/network/Cargo.toml

@@ -11,7 +11,6 @@ lazy_static = "1.4.0"
 matches = "0.1.8"
 tempfile = "3.1.0"
 exit-future = "0.2.0"
-assert_approx_eq = "1.1.0"
 
 [dependencies]
 beacon_chain =  { path = "../beacon_chain" }

beacon_node/store/Cargo.toml

@@ -10,7 +10,6 @@ harness = false
 
 [dev-dependencies]
 tempfile = "3.1.0"
-sloggers = "1.0.0"
 criterion = "0.3.2"
 rayon = "1.3.0"