Get rid of the dead code in DeltaValueStoreJsonImpl because DeltaValueStore no longer tracks deletes.

Patch by: amitmanjhi
Review by: rjrjr


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8641 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed