Remove wrong CF dependency in sys crate

Author: faern

system-configuration-sys/Cargo.toml

@@ -10,7 +10,6 @@ license = "MIT/Apache-2.0"
 build = "build.rs"
 
 [dependencies]
-core-foundation = { git = "https://github.com/servo/core-foundation-rs", version = "0.4.4" }
 core-foundation-sys = { git = "https://github.com/servo/core-foundation-rs", version = "0.4.4" }
 
 [build-dependencies]