[Cashtab] Remove unused chronik param from Ticker.js

Summary:
Depends on D13901

Param was used in first approach to implementing aliases in Cashtab. No longer used.

Test Plan:
npm test
grep -r chronikTxsPerPage src/ and no output

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D13902