Revert "[DLC vNext] Create StatsLogger helper class and add tests"

This reverts commit e6704ba3f3a653ea98728ca805d7dfbf400d640b.

Reason for revert: Experimenting without this CL because this CL may be the culprit of some recent test failures.

Bug: b/308908722, b/308898881, b/308896144
Change-Id: Ie6a6d83638d2e70e385db01c7e8abc8ed2665efa
11 files changed