zink: don't destroy swapchain on initial CreateSwapchainKHR fail

this used to be correct at some point but now it no longer is

cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23970>

src/gallium/drivers/zink/zink_kopper.c

@@ -313,7 +313,6 @@ kopper_CreateSwapchain(struct zink_screen *screen, struct kopper_displaytarget *
       VkResult result = VKSCR(QueueWaitIdle)(screen->queue);
       if (result != VK_SUCCESS)
          mesa_loge("ZINK: vkQueueWaitIdle failed (%s)", vk_Result_to_str(result));
-      zink_kopper_deinit_displaytarget(screen, cdt);
       error = VKSCR(CreateSwapchainKHR)(screen->dev, &cswap->scci, NULL,
                                    &cswap->swapchain);
    }