Update snapcraft.yaml (#292)

Snapstore permissions can't handle two snapd-control interfaces.

Removing the original one. Doesn't change anything as the attribute
needs setting separately after the snap is installed to use it. Default
behaviour should be identical.

snap/snapcraft.yaml

@@ -52,7 +52,6 @@ apps:
       - scsi-generic
       - shutdown
       - snapd-control-managed
-      - snapd-control
       - system-observe
       - account-control
       - process-control