Travis-CI configuration file is broken and obstructive
The Travis-CI configuration file seems to be unused and doesn't work.
It should be updated or removed, but I suggest it should be removed.
- Avoid the implication that GROMACS is actively tested on Travis-CI.
- Simplify maintenance of GROMACS forks that maintain their own Travis-CI configuration.
- A commit to remove the file may inadvertently remove a modified .travis.yml in a GROMACS fork when updating the fork.
Remediation: retrieve the modified config file from the fork and add it back to the forked repo in a new commit.
- Travis-CI assumes expects the master branch of a repository to have a config file, so forks would need to add a config to their master branch, making it different from the upstream master branch.
Remediation: fork repositories either apply changes to their master branch, use a different name for their default branch, and/or maintain their unaltered copy of Gerrit `master` with a different name.