Remove the useless mts tag since the tests only contain in one MTS module test plan. am: 95fb0801bf am: ea0c411d29

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3363287

Change-Id: Iec4c618664e496d2b65460ac874c54f42f2ac90b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>