Update where to display how it works again

[mbeacom]

Description

The goal of this PR is to no longer display "How it works" on about, mission, slack, and results pages following further request/clarification.

Checklist

• linter status: 100% pass
• changes don't break existing behavior
• commit message follows commit guidelines

Affected core subsystem(s)

Testing

Locally

[codecov]

Codecov Report

Merging #1576 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1576   +/-   ##
=======================================
  Coverage   28.42%   28.42%           
=======================================
  Files         130      130           
  Lines        9588     9588           
  Branches     1240     1240           
=======================================
  Hits         2725     2725           
  Misses       6765     6765           
  Partials       98       98

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[owocki]

should we add it to the footer?

http://bits.owocki.com/0X3N0W2h0Q0v/Screen%20Shot%202018-06-30%20at%207.42.53%20PM.png

[SaptakS]

should we add it to the footer?

I think we should.

[owocki]

i dont think i understand the rationale for doing this. someone catch me up?