Revert "travis: work around temporary test failure due to rustc crashing on hyper."
Revert "travis: work around temporary test failure due to rustc crashing on hyper."

This reverts commit 326270ad1221b54028f9d029881fa0b1fb742db9.

aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust