[Cashtab] Remove antd pointerevents shim from tests
Summary:
T2207
We had this shim everywhen in the app as antd collapses interfered mysteriously with react testing library user event button clicks
we do not need it anymore. lose it.
Test Plan: npm test
Reviewers: #bitcoin_abc, emack
Reviewed By: #bitcoin_abc, emack
Differential Revision: https://reviews.bitcoinabc.org/D15941