World clock

Hi DAldama.

Welcome to the Apple Community.

Apple Support has articles online about watch faces.

Thank you for your question: "Can world clock be removed from Apple Watch face"

Wondering if you mean the world clock face, and not the world clock app.

You can delete watch faces, or you can just choose from other clock faces instead.

Customize the watch face – Apple Support

scroll down for the steps on how to delete a watch face from your collection

(There is a world clock face, in the collection of watch faces.)

Also: see in the above article:

how to view all the watchfaces on your watch,

how to see / choose a watch face to have displayed, and how to customise it, if you want to

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Seems the World Clock app can be turned on or off whenever you want

Use World Clock on Apple Watch to check the time in other locations – Apple Support

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To scroll online through images of all the watch faces you can choose from on your watch:

see: Apple Watch faces and their features – Apple Support

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Or to add more Watch faces to your watch

Explore the Face Gallery on Apple Watch – Apple Support

When you find one that looks interesting, 

you can customize it, choose complications, 

then add the face to your collection—all from the gallery.

NB: In some countries available watch faces may not all be available.

All the best :-)