update readme

Author: RedGradient

README.md

@@ -14,5 +14,4 @@ $ make build
 * Linux: wrong calculation of click on the GLArea
 * macOS: GTK warnings in console: "Broken accounting of active state for widget"
 * 'Wardrobe' and 'Reset' actions do not support undo/redo operations
-* HTTP API request to skin API is synchronous
 * No asking to save before closing the App