Removed dependencies we no longer use.

Alex Helfet · Alex Helfet · commit feba5a006914 · 2017-12-24T00:04:59.000Z
diff --git a/Cargo.toml b/Cargo.toml
@@ -14,9 +14,7 @@ chrono = "^0.4"
 clap = "^2.14.0"
 env_logger = "^0.4.3"
 error-chain = "^0.11.0"
-libc = "^0.2.17"
 log = "^0.3.8"
-ref_slice = "^1.1.0"
 
 [dev-dependencies]
 tempdir = "0.3.5"
