Remove FlickerService tests

Temporary remove the FlickerService tests to be able to re-enable the
platinum tests. These tests seems to be causing a failing in the test
runner which crashes everything before the platinum tests can actually
run.

Test: forrest run of the platinum tests
Bug: 290795722
Change-Id: I31395675e6f24555de0fdbb7e1e50ea4fe52d7e5