To fix this, if you got to the Team Explorer tab and click on the Manage Connections button (the green one a the top) you will see a list of local Git Repositories.
Right click on the repository you want to stop tracking the storage.ide file on and select Open Command Prompt.
You should then be able to type the following:
git rm --cached -r .vs
This removes the .vs folder and its contents and subdirectories from being tracked in git.