removed empty Revit API assembly references from FamilyVb project

6 warnings:

------ Rebuild All started: Project: IntroCs, Configuration: Debug Any CPU ------
  IntroCs -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\1_Revit_API_Intro\SourceCS\bin\Debug\IntroCs.dll
------ Rebuild All started: Project: IntroVb, Configuration: Debug Any CPU ------
  IntroVb -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\1_Revit_API_Intro\SourceVB\bin\Debug\IntroVb.dll
------ Rebuild All started: Project: XtraCs, Configuration: Debug Any CPU ------
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraCs\Labs2.cs(254,32,256,50): warning CS0618: 'Document.NewTag(View, Element, bool, TagMode, TagOrientation, XYZ)' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraCs\Labs2.cs(271,17,272,70): warning CS0618: 'Document.NewTag(View, Element, bool, TagMode, TagOrientation, XYZ)' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraCs\Labs2.cs(280,17,281,70): warning CS0618: 'Document.NewTag(View, Element, bool, TagMode, TagOrientation, XYZ)' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'
  XtraCs -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraCs\bin\Debug\XtraCs.dll
------ Rebuild All started: Project: XtraVb, Configuration: Debug Any CPU ------
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraVb\Labs2.vb(133,39): warning BC40000: 'Public Overloads Function NewTag(dbview As View, elemToTag As Element, addLeader As Boolean, tagMode As TagMode, tagOrientation As TagOrientation, pnt As XYZ) As IndependentTag' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'.
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraVb\Labs2.vb(137,17): warning BC40000: 'Public Overloads Function NewTag(dbview As View, elemToTag As Element, addLeader As Boolean, tagMode As TagMode, tagOrientation As TagOrientation, pnt As XYZ) As IndependentTag' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'.
C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraVb\Labs2.vb(141,17): warning BC40000: 'Public Overloads Function NewTag(dbview As View, elemToTag As Element, addLeader As Boolean, tagMode As TagMode, tagOrientation As TagOrientation, pnt As XYZ) As IndependentTag' is obsolete: 'This method is deprecated in Revit 2018 and will be removed in a future version. Use IndependentTag.Create() instead.'.
  XtraVb -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\XtraVb\bin\Debug\XtraVb.dll
------ Rebuild All started: Project: UiCs, Configuration: Debug Any CPU ------
  UiCs -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\2_Revit_UI_API\SourceCS\bin\Debug\UiCs.dll
------ Rebuild All started: Project: UiVb, Configuration: Debug Any CPU ------
  UiVb -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\2_Revit_UI_API\SourceVB\bin\Debug\UiVb.dll
------ Rebuild All started: Project: FamilyCs, Configuration: Debug Any CPU ------
  FamilyCs -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\3_Revit_Family_API\SourceCS\bin\Debug\FamilyCs.dll
------ Rebuild All started: Project: FamilyVb, Configuration: Debug Any CPU ------
  FamilyVb -> C:\a\lib\revit\2018\adn\src\AdnRevitApiLabsXtra\3_Revit_Family_API\SourceVB\bin\Debug\FamilyVb.dll
========== Rebuild All: 8 succeeded, 0 failed, 0 skipped ==========