Hide unavailable options of variants in shopify product page

Demo Link with swatch : https://youtu.be/r-tRzyT976o
Demo Link without swatch; i.e dropdown : https://youtu.be/PYSXcEScKY0

By default, Shopify theme doesn't have feature to hide unavailable options in Swatch/Dropdown.

Most client's wants to hide options which are Unavailable in store.
So I can customise theme so that only available options will be visible.

You can also contact of you want to hide Sold out variants on product page of shopify.

*Note: This is only for Unavailable variants, Not Sold Out.