refactor(runtime-core): remove the deactivated branch in unmountCompo…

[zhangzhonghe]

// deactivated hook
if (
  da &&
  !isDeactivated &&
  instance.vnode.shapeFlag & ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE
) {
  queuePostRenderEffect(da, parentSuspense)
}

queuePostRenderEffect(da, parentSuspense)永远都不会被执行，
因为在unmount函数中已经处理过instance.vnode.shapeFlag & ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE为true的情况，
如下为函数unmount中的代码：

if (shapeFlag & ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE) {
  ;(parentComponent!.ctx as KeepAliveContext).deactivate(vnode)
  return
}

[yyx990803]

good catch!