Remove 'How It Works' from mkdocs navigation

Removed 'How It Works' section from navigation.

Author: resmo

mkdocs.yml

@@ -10,7 +10,6 @@ nav:
   - Overview:
     - Why: overview/why.md
     - Our Approach: overview/approach.md
-    - How It Works: overview/how-it-works.md
     - FAQ: overview/faq.md
     - Project: overview/project.md