Remove old twitter logo image if not used

[CalvinWilkinson]

Complete The Items Below

• A priority label has been added to this issue.

Description

If not used by any repository in the organization, remove the Twitter logo image with the file name twitter-logo-16x16.svg.

Warning

Make sure to do a search organization-wide for any references to the old log before removing it.

Acceptance Criteria

The items to complete to satisfy the Definition of Done.

• The organization has been searched for references to the old logo first.
• The Twitter logo has been removed.