Revert "add support for the m7 (all variants)"

This reverts commit 38bef87c07bca497d00a33bf8fc2548da2327675.
Revert "Update default.xml"

This reverts commit edacb07183e42ffc7d58dfed2e8e409f12679276.
Revert "Update default.xml"

This reverts commit 2eb3d966ae47ca0e95954d2c2338f0e685ff9694.