remove deprecated extension (#48)

README.md

@@ -15,7 +15,6 @@ A curated list of delightful [Visual Studio Code](https://code.visualstudio.com/
  - [Python](#python)
  - [Rust](#rust)
 - [Themes](#themes)
- - [Custom theme for VS code](#custom-theme-for-vs-code)
  - [Material-theme](#material-theme)
  - [Base16 Ocean Kit](#base16-ocean-kit)
  - [Seti](#seti)
@@ -155,13 +154,6 @@ Unlike some other editors, VS Code supports IntelliSense, linting, outline out-o
 
 Unfortunately, VS Code doesn't support custom UI themes yet https://github.com/Microsoft/vscode/issues/1833
 
-However, this extension allow you to do it by patching VS code, until it's implemented as a default feature :
-
-#### [Custom theme for VS code](https://marketplace.visualstudio.com/items?itemName=bentx.vscode-custom-theme)
-> Customize your Visual Studio Code experience, use your own colors.
-
-![](https://raw.githubusercontent.com/bentx/vscode-custom-theme/master/images/screen.gif)
-
 If you're feeling brave, there are at least two custom UIs for VS Code:
 
 - [Essence](https://github.com/flagello/Essence)