The issue appears to be resolved after latest upgrade, with Unity 6.8.0, as now, there is a "Remove from Launcher" option in the contextual menu of Samba/network shares icons in the Launcher.
The issue appears to be resolved after latest upgrade, with Unity 6.8.0, as now, there is a "Remove from Launcher" option in the contextual menu of Samba/network shares icons in the Launcher.