Remove check for `version` property in Package presenter
Remove check for `version` property in Package presenter

We seem to default to the latest release in the UI.

An example URL that is affected by this is `/package/formula` which
claims an error with this check and displays fine with a correct version
as the latest release without it.

Fixes #1342.

rutaihwa/newww,kemitchell/newww,kemitchell/newww,supriyantomaftuh/newww,nexdrew/newww,watilde/newww,amilaonbitlab/newww,jonathanmarvens/npm-newww,watilde/newww,amilaonbitlab/newww,watilde/newww,kemitchell/newww,supriyantomaftuh/newww,supriyantomaftuh/newww,aredridel/newww,aredridel/newww,amilaonbitlab/newww,nexdrew/newww,nexdrew/newww,rutaihwa/newww,jonathanmarvens/npm-newww,aredridel/newww,jonathanmarvens/npm-newww,rutaihwa/newww