Totally agree, please bring back a way to remove unwanted synths from inventory. I don't care if we put little recycling containers next to the vault access terminals... Just let us do excess items. We can dismantle armor and weapons, why not other items? Please address this Bungie. And thanks for the awesome game.
As far as materials, you can discard them while in your inventory with the "x" button on the xbone and 360.
I really don't want to throw things away when the game sets a value for them. Right now the trade value for synths is 250G or some combination of black wax or motes. That's value. So they're not garbage.