docs: remove reference to what about lab

Description

This removes the reference to what about lab that was removed in !1087 (merged)

Related Issues

Related to #1013 (closed)

How has this been tested?

Hasn't been, but it's just deleting a line from a doc.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)