MacOS Chrome horizontal scrollbar not disappearing
This is Chrome issue: https://bugs.chromium.org/p/chromium/issues/detail?id=914844#c36
Many people are adding white space of scrollbar size (25px) to prevent scrollbar from obscuring content. It is workaround and can be considered only as a temporary solution though.
From the ticket, they give a workaround until the issue is fixed:
Go into your System Preferences
> General
Select Always
: