Fix some Cargo.toml issues

Cargo.toml

@@ -16,6 +16,4 @@ aeron_driver-sys = { path = "./aeron_driver-sys" }
 memmap = "0.7"
 
 [dev-dependencies]
-clap = "2.33"
-ctrlc = "3.1.3"
-tempfile = "3.1"
+tempfile = "3.1"

aeron_driver-sys/Cargo.toml

@@ -15,3 +15,8 @@ dunce = "1.0.0"
 
 [features]
 static = []
+
+[dev-dependencies]
+clap = "2.33"
+ctrlc = "3.1.3"
+tempfile = "3.1"

aeron_driver-sys/src/lib.rs

@@ -6,8 +6,6 @@ include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
 #[cfg(test)]
 mod tests {
-    use crate::*;
-    use std::convert::TryInto;
 
     #[test]
     fn version_check() {