Remove the registerCompletionFuncForGlobalFlags for now, as
the error it returned was ignored, so it didn't add much
benefit, other than abstracting things.
Split the underlying completion-functions to separate
functions, and add some basic tests for them.
Remove the completions helper, as it now didn't add much,
and it saved having the dependency on the package.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Sebastiaan van Stijn