Revert "hammerhead: Add support for modem logging" [DO NOT MERGE]

Modem logging disabled

Bug: 12486394

This reverts commit 62c468c2ec192d99e5f3eaa1b51db96382b7dbd9.

Change-Id: I3edaa52b7d75dc131214837e58ab0134025b62bc
Merge "Revert "hammerhead: Add support for modem logging" [DO NOT MERGE]" into du44