[e.cash] Remove old countdown from anoucment bar

Summary: Removing the old countdown from the static annoucment bar as no long needed

Test Plan: Preview the site, should be no changes to current build

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D14793