Removing client and test from the master branch.

On tm-qpr-dev, we want to define these in different ways and in
different CLs. Therefore, we need to remove them from master, to allow
CLs like ag/20470331 and ag/20336783 to be submitted without automerging
conflicts on master.

Bug: 254857637
Test: N/A
Change-Id: Iadad9499145368acec8e3ed64111a8e1d8c6fc86