chore(VirtualLisr): remove unused imports and change comment

src/shared/ui/VirtualList/VirtualList.svelte

@@ -13,8 +13,6 @@ import { createVirtualizer } from '$shared/lib';
 import { throttle } from '$shared/lib/utils';
 import { cn } from '$shared/shadcn/utils/shadcn-utils';
 import type { Snippet } from 'svelte';
-import { flip } from 'svelte/animate';
-import { quintOut } from 'svelte/easing';
 
 interface Props {
     /**
@@ -187,7 +185,7 @@ $effect(() => {
 
 const throttledVisibleChange = throttle((visibleItems: T[]) => {
     onVisibleItemsChange?.(visibleItems);
-}, 150); // 150ms debounce
+}, 150); // 150ms throttle
 
 const throttledNearBottom = throttle((lastVisibleIndex: number) => {
     onNearBottom?.(lastVisibleIndex);