stylesheets: cleanup fonts style
stylesheets: cleanup fonts style

There's no need to quote Adelle, neither Times New Roman; none have
special characters.

Signed-off-by: Felipe Contreras <de77a8b9cd239b204c19c52ed62e48ab47243362@gmail.com>

git/git-scm.com,git/git-scm.com,git/git-scm.com,git/git-scm.com