Revert "Show `sudo` environment when preserving environment"
Revert "Show `sudo` environment when preserving environment"

This doesn't work
<https://travis-ci.org/l0b0/travis-ci-helper/builds/89838057#L182>:

sudo: must be setuid root
make: *** [environment] Error 1

This reverts commit def2200fc91ecb4f665c371deabf00f0a43c2cb7.

l0b0/travis-ci-helper,l0b0/travis-ci-helper