Remove unused VBucket::updateStoredValue() and addNewStoredValue() added wrongly
Remove unused VBucket::updateStoredValue() and addNewStoredValue() added wrongly

These functions were made pure virtual functions and implemented in derived
classes in 61eaced57a2beeaffceb3d72707fa0310d2d0c69.

However they crept back-in in a future commit
0dd9f135975845f42b4b37506203afc5e079370d.

Removing them again.

Change-Id: I1b7c3ec4f1427678c959b377e91c2fac898b2b2a
Reviewed-on: http://review.couchbase.org/74663
Reviewed-by: Daniel Owen <b3fc0e1a51f252986e60be7da121b74d3ac6845f@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

membase/ep-engine,membase/ep-engine,couchbase/ep-engine,couchbase/ep-engine,daverigby/kv_engine,couchbase/ep-engine,membase/ep-engine,daverigby/kv_engine,membase/ep-engine,daverigby/kv_engine,couchbase/ep-engine,daverigby/kv_engine