The latest version of VS Code installed a few days ago (the October 2017 update) keeps adding all kinds of strange import statements to the top of the .ts code file.
Updated for new version of VSCode 2019 for using the UI to modify the setting.
So choose the File > Preference > Setting then search auto in the Workspace secton. Find the Javascrtip or Typescript with highlight word auto import then check or uncheck for enable / disalbe this function.
Here is the picture for reference.