(tech.gsa.gov) Remove all non-unique playbooks

[vickimcfadden]

Remove all playbooks except for unique authored content:

• database transformation lessons learned
• database transformation playbook

Keep an archived version of it somewhere in case people inquire / need it later.

Notes:

• Data migration sensitive data migration is a PDF that I can't find available anywhere else on GSA web properties, that can go too.
  RPA playbook is unique content but not valuable, that can go too.
  TBM is not a methodology GSA still follows, that playbook can go.

[jfredrickson]

Ready for review: https://federalist-cfade689-2192-403e-a4d0-0335f68f0203.sites.pages.cloud.gov/preview/gsa/cto-website/jf/remove-playbooks/playbooks/

[vickimcfadden]

LGTM @jfredrickson ! Thank you!