[docs] Remove redundant information

[docs] Remove redundant information

Armband and fuel documentation have been the same for E release.
Instead of duplicating everyhting, make references to Fuel from armband
docs. I removed the scenario folder as it should not have been here in the
first place, otherwise the folder structure is kept as is.

JIRA: ARMBAND-357

Change-Id: I060f22aee60713cabfd09ccf2fc0201e68a03c2a
Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>