fix: remove unused shit

Author: Mygod

src/components/popups/BackgroundThemeProvider.jsx

@@ -30,17 +30,6 @@ const BackgroundStylesContext = React.createContext({
   visuals: undefined,
 })
 
-/**
- * Accessor for background styling context.
- * @returns {{
- *  hasBackground: boolean
- *  visuals?: any
- * }}
- */
-export function useBackgroundStyles() {
-  return React.useContext(BackgroundStylesContext)
-}
-
 /**
  * Wraps popup content with a dark theme override when a background image is present.
  *