How to remove shipping method from the checkout page?
But, If I am not select shipping method then I am not able to place the order.
If you are not select shipping method then you are not able to place the order. Any way to achieve your task you need to follow this step:
You can remove certain shipping methods from the checkout page by simply disabling them in the configuration of your store.
Navigate Admin Panel > Stores > Settings > Configuration > Sales >Shipping Methods.
You will have a full list of your current shipping methods and you can enable/disable them to fit your needs.
In addition, you will not be able to place an order if a shipping method is not selected. To achieve that, try this: Magento 2 How to remove shipping method in checkout page