1. Go to File > Revert File

2. Hit Ctrl+Shift+p, then search for File: Revert File and press enter to execute

References:

• https://github.com/microsoft/vscode/issues/17643
• https://stackoverflow.com/questions/45858604/how-can-one-discard-individual-changes-in-a-file-in-visual-studio-code/65414887#65414887