chore: delete unused code

src/shared/ui/Section/types.ts

@@ -0,0 +1,17 @@
+import type { Snippet } from 'svelte';
+
+/**
+ * Type for callback function to notify when the title visibility status changes
+ *
+ * @param index - Index of the section
+ * @param isPast - Whether the section is past the current scroll position
+ * @param title - Snippet for a title itself
+ * @param id - ID of the section
+ * @returns Cleanup callback
+ */
+export type TitleStatusChangeHandler = (
+    index: number,
+    isPast: boolean,
+    title?: Snippet<[{ className?: string }]>,
+    id?: string,
+) => () => void;