Set this page to have no side bar by adding the page name to the theme option no_sidebar.
import os
import themata
project = 'Sugar Doc'
copyright = '2020, Adewale Azeez'
author = 'Adewale Azeez'
html_favicon = 'favicon.png'
html_theme = 'sugar'
html_theme_options = {
'no_sidebar': [
'otherpages/singlepage'
]
}