Remove I3DEngine CryCommon Interface (#567)

Delete:

- I3DEngine
- Missions
- Time of day
- GameEffectsSystem Gem
- ImageProcessing Gem
- SVOGI Gem
- Various other things that don't do anything now that the legacy renderer has been removed.

Code/Sandbox/Editor/BaseLibraryManager.cpp

@@ -826,9 +826,6 @@ void CBaseLibraryManager::OnEditorNotifyEvent(EEditorNotifyEvent event)
         SetSelectedItem(0);
         ClearAll();
         break;
-    case eNotify_OnMissionChange:
-        SetSelectedItem(0);
-        break;
     case eNotify_OnCloseScene:
         SetSelectedItem(0);
         ClearAll();