remove unused styles

docs/assets/plugins/code-block/code-block.css

@@ -226,14 +226,3 @@ body.flavor-html [data-flavor]:not([data-flavor='html']) {
 body.flavor-react [data-flavor]:not([data-flavor='react']) {
   display: none;
 }
-
-/*
-.code-block--expanded.code-block--show-html .code-block__source--html,
-.code-block--expanded.code-block--show-react .code-block__source--react,
-
-When a code block is expanded but doesn't have a React example, force the HTML example to show
-
-.code-block--expanded:not(.code-block--has-react) .code-block__source--html {
-  display: block;
-}
-*/