Revert "Add mdns tests to ConnectivityCoverageTests"

This reverts commit 3d686a1c3aae84c317fa54a3eb8189808aa1111e.

Reason for revert: Revert this CL because we have got the mdns code coverage data.

Change-Id: Iffc202a9418876b577bf76b2d2a27fa0fc0b34a5
1 file changed