remove VSCode links to empty repos

Author: Emily

README.md

@@ -23,13 +23,6 @@ The [Codemirror][codemirror] syntax theme is generated by the [codemirror](./lib
 - [codemirror-github-light](https://github.com/primer/codemirror-github-light)
 - [codemirror-github-dark](https://github.com/primer/codemirror-github-dark)
 
-### [Visual Studio Code][vscode]
-
-The [Visual Studio Code][vscode] syntax theme is generated by the vscode adapter.
-
-- [github-vscode-syntax-light](https://github.com/primer/github-vscode-syntax-light)
-- [github-vscode-syntax-dark](https://github.com/primer/github-vscode-syntax-dark)
-
 ### [Atom][atom]
 
 The [Atom][atom] theme is built by `apm` converted from the [TextMate][tm] theme.