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 mr1 will be down
revisioned to 1.0.

Bug: 64999074
Test: build & run
Change-Id: Ife60328110c6d6cb3e8024fb4a5caabc4c7c034f