[509216] Remove obsolete standalone_products directory

The job performed by this separate mvn build structure is now done with
the build-release-rcp profile in the "main" mvn build under /parent

Bug: 509216
Change-Id: Idb882ae170de392b31afebdc71a8d8c9c280379a
Signed-off-by: Krum Tsvetkov <krum.tsvetkov@sap.com>
26 files changed