Remove dependencies on unused external crates from client/.

[briansmith]

No description provided.

[bluejekyll]

Is there a test we can add for this, to make sure that there are no unused dependencies?

[briansmith]

Is there a test we can add for this, to make sure that there are no unused dependencies?

rustc (at least, rustc 1.23 Nightly) will issue a warning when building a crate that has an extern create $X where $X isn't used anywhere. That's how I noticed some of these.

I know of no way to automatically find out that Cargo.toml references crates that aren't used. I am manually going through the Cargo.tomls and removing the dependencies by hand.

[coveralls]

Coverage remained the same at 87.397% when pulling 46aa3e6 on briansmith:client-minimize-deps into 227c77a on bluejekyll:master.

[coveralls]

Coverage decreased (-0.02%) to 87.378% when pulling 46aa3e6 on briansmith:client-minimize-deps into 227c77a on bluejekyll:master.

[coveralls]

Coverage remained the same at 87.397% when pulling 60eef84 on briansmith:client-minimize-deps into 0bb0b2c on bluejekyll:master.

[coveralls]

Coverage decreased (-0.02%) to 87.378% when pulling 31ebc0b on briansmith:client-minimize-deps into 9da5578 on bluejekyll:master.