Issue title: Axis ticks are redundantly aligned to empty axis ticks
 Issue body: Demo: http://jsfiddle.net/highcharts/1dbt0cca/

The right Y axis is empty, nonetheless the left axis ticks are aligned to a pre-computed tick amount.
 Comments: 
 Comment 0: Demo with fix applied: http://jsfiddle.net/highcharts/1dbt0cca/1/
{'source': 'GithubIssues', 'repo_name_with_owner': 'highslide-software/highcharts.com', 'issue_id': 78033505, 'repo_stars': 4434.0}