Fixes #6195, bz1109386 - 403 on cv version delete

Content view remove call specifying versions and envs to be removed / unasssociated
had a minor glitch -> env_ids - @view.environment_ids.map(&:to_s)).empty?
env_ids = [1,2,3]  while @view.environment_ids.map(&:to_s) = [1,2,3]
Problem was API was treating it like a list of strings while params code changed it to ints
This commit should fix that issue
Why not use permit here?

```ruby
options = params.slice(:system_content_view_id,
                                     :system_environment_id,
                                     :key_content_view_id,
                                     :key_environment_id,
                                     :content_view_version_ids => [],
                                     :environment_ids => []
                                    )
```