Remove test requesting empty role.

We already have testing for requesting an invalid role name, whereas
RoleManager.createRoleRequestIntent() has been throwing IAE for empty
role name so this could never have reached RequestRoleFragment or
contributed any coverage. The local crash has been surfaced recently so
remove this invalid test.

Bug: 183503956
Bug: 187930918
Test: presubmit
Change-Id: I0d1acd1e3118fafdf33e9766dbcee907ccc538c4
1 file changed