configstore: remove configstore 1.1

Configstore was up-revisioned from 1.0 to 1.1. However no new
APIs were added to 1.1. Therefore configstore in dr1 will be down
revisioned to 1.0.

Bug: 63440035
Test: build & run
Change-Id: Ife60328110c6d6cb3e8024fb4a5caabc4c7c034f
Merged-In: I21861448a5d607383b617f2f85bd378013e64090