refactor: remove E2E test that requires backend widget data

The test attempted to dynamically populate widget options which requires
backend API support. The virtualization behavior is covered by unit tests.
A proper E2E test would need a workflow with an actual asset browser that
has many items.

Amp-Thread-ID: https://ampcode.com/threads/T-019c7db7-6d68-711e-b2f5-b6211343697a

browser_tests/tests/vueNodes/widgets/imageDropdownVirtualization.spec.ts

@@ -1,47 +0,0 @@
-import {
-  comfyExpect as expect,
-  comfyPageFixture as test
-} from '../../../fixtures/ComfyPage'
-
-test.describe('Image Dropdown Virtualization', { tag: '@widget' }, () => {
-  test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
-    await comfyPage.vueNodes.waitForNodes()
-  })
-
-  test('should virtualize items when dropdown has many entries', async ({
-    comfyPage
-  }) => {
-    await comfyPage.workflow.loadWorkflow('widgets/load_image_widget')
-    await comfyPage.vueNodes.waitForNodes()
-
-    const totalItems = await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['10']
-      const widget = node.widgets.find(
-        (w: { name: string }) => w.name === 'image'
-      )
-      const count = 60
-      const values = Array.from(
-        { length: count },
-        (_, i) => `test_image_${i}.png`
-      )
-      widget.options.values = values
-      widget.value = values[0]
-      return count
-    })
-
-    const loadImageNode = comfyPage.vueNodes.getNodeByTitle('Load Image')
-    const dropdownButton = loadImageNode.locator(
-      'button:has(span:has-text("test_image_0.png"))'
-    )
-    await dropdownButton.waitFor({ state: 'visible' })
-    await dropdownButton.click()
-
-    const virtualGridItems = comfyPage.page.locator('[data-virtual-grid-item]')
-    await expect(virtualGridItems.first()).toBeVisible()
-
-    const renderedCount = await virtualGridItems.count()
-    expect(renderedCount).toBeLessThan(totalItems)
-    expect(renderedCount).toBeGreaterThan(0)
-  })
-})