title: Clear variables VS Code
body: <p>Coming over from a Matlab environment to VSCode. I really miss the ability to delete variables as needed. I think this is what's happening here. I'm trying to write an equation in vscode. One of the variables was misspelled as "simga"; I inteded it to be "sigma" (NOTE THE PLACEMENT OF THE "M"). For whatever reason, it seems like vscode keeps recognizing "simga". If this were matlab, I could delete all variables and start over. Not sure how to do this in vscode. Screenshot attached for reference.
  Would appreciate suggestions,
  Thanks!</p>
  
  <p><a href="https://i.stack.imgur.com/mmfd8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mmfd8.jpg" alt="enter image description here"></a></p>