Reports Burndown Chart

[Emil Naghiyev]

Hello, how can I remove some custom fields from this Metric Selector in Reports -> Burnown Chart?

I removed these custom fields from Screens, Field Configuration, this custom field has no value for in the tasks of this Project. 

Custom field was global, I removed it from this project in its settings. 

What I have not done yet is Reindexing. May it be because of that it is still visible in the Reports?

[Emil Naghiyev]

I came across this post, where they say you cannot hide it, which I find very annoying to be honest. 

https://community.atlassian.com/forums/Jira-questions/Custom-filed-appeared-in-Burndown-chart/qaq-p/1263765

If there is Feature Request from Atlassian about this, I would be happy to mention it also there.