Remove the IExplorationFeature EClass from the exploration MM
Current status
The IExplorationFeature EClass was intended to specify the features enabled in a DSE and passed as a list to the backend. However, features are now defined in a service type in the exploration.alg plugin. It is not used in the SMT plugin.
Proposed change
Remove the EClass as a soon as the DSE project is ready: not urgent.
(from redmine: issue id 3591, created on 2018-12-11, closed on 2019-10-07)