Latex 'releasename' ignored in version 2.0.0

[tbird1965]

Latex 'releasename' Broken in verion 2.0.0
Setting latex element releasename no longer works, displays "Release" instead.

To Reproduce
Edit conf.py and set latex_elements as follows:

latex_elements = {
'releasename': 'Test',
}

Then build latex:

make latex

View latex file and you will see:

\renewcommand{\releasename}{Release}

Expected behavior
Sphinx version 1.8.5 and older (at least until the 1.7.x and possibly older) even allows releasename to be a space (which I use).

I use Sphinx for custom product manuals and using the word "Release" makes no sense. My conf.py files are setup so the PDFs will display "Version 1.0" on the title page.

In version 2.0.0, my PDFs display "Release Version 1.0"

Environment info

• OS: Windows 7, 64 bit, SP1
• Python version: 3.6.5
• Sphinx version: 2.0.0
• Sphinx extensions: none, that I know of
• Extra tools: MiKTeX 2.9 for PDF build

Temporary Workaround
Either use Sphinx 1.8.5 or edit latex file and manually change the releasename entry.

[tk0miya]

Fixed by #6253.
Thank you for reporting.