This is enabled by default in later versions of Rubocop. Making this
change now removes this conflict for people running later versions.
Automatically fixed with `rubocop -a`
This has no violations and there doesn't seem to be a good reason to
disable it.
Also it had two declarations - these were both added in the initial
commit which added Rubocop - presumably due to the config being copied
from a previous project (?).
* CI against Ruby 2.2.8/2.3.5/2.4.2
* Remove unnecessary magic comments with ruby 2.0 or later
* Change `TargetRubyVersion` to 2.0
ruby 1.9.3 has already been dropped by 0569b065d7
* Change `TargetRubyVersion` to 2.1
* Drop jruby1.7 on Travis