Remove volunteering from navbar

[a8t]

Makes the primary Call to action more clear - request help

[emphone88]

@a8t If we remove volunteer first, we won't have any links to the page. What do you think about this alternative solution:

• Remove volunteer call to action button on navigation
• Remove volunteer call to action on homepage splash
• Add copy in About Us page about Volunteering (link to volunteer page)
• Footer: Add "Volunteer"