remove completion test, no assertions
remove completion test, no assertions

The completion spec was not complete so it was dropped. In the future we
shall have a more robust completion test once we implement completion
based on AST transformation.

nbargnesi/bel.rb,OpenBEL/bel.rb,abargnesi/bel.rb,OpenBEL/bel.rb,nbargnesi/bel.rb,nbargnesi/bel.rb,OpenBEL/bel.rb,OpenBEL/bel.rb,OpenBEL/bel.rb,abargnesi/bel.rb,abargnesi/bel.rb,abargnesi/bel.rb,abargnesi/bel.rb,nbargnesi/bel.rb,OpenBEL/bel.rb,nbargnesi/bel.rb,abargnesi/bel.rb,OpenBEL/bel.rb,nbargnesi/bel.rb