fix(core): remove plugins settings (#5337)

depend on https://github.com/toeverything/AFFiNE/pull/5324

tests/kit/utils/setting.ts

@@ -19,9 +19,6 @@ export async function openAppearancePanel(page: Page) {
 export async function openShortcutsPanel(page: Page) {
   await page.getByTestId('shortcuts-panel-trigger').click();
 }
-export async function openPluginsPanel(page: Page) {
-  await page.getByTestId('plugins-panel-trigger').click();
-}
 
 export async function openAboutPanel(page: Page) {
   await page.getByTestId('about-panel-trigger').click();