Reverting CGFontRenderingFontSmoothingDisabled in VSCode
For each defaults write x y z run defaults delete x y,
where x is the domain, y is the key and z is the value.

For example, to delete the first key that was set, run

defaults delete com.microsoft.VSCode CGFontRenderingFontSmoothingDisabled



Omit the value (e.g. 0) when deleting a key since the key is deleted regardless of value.
-g is a reference to the global domain; if you didn't write the key to the global domain then don't include -g when deleting.
The delete or write verb needs to go before other options like the domain, not after.