Only import what we need from xtgeo

[BenjaminDanielsen]

Short description

Only import what we need from xtgeo

Pre-review checklist

• Read through all changes. No redundant print() statements, commented-out code, or other remnants from the development. 👀
• Make sure tests pass after every commit. ✅
• New/refactored code is following same conventions as the rest of the code base. 🧬
• New/refactored code is tested. ⚙
• Documentation has been updated 🧾

Pre-merge checklist

• Commit history is consistent and clean. 👌

[BhagavathAchani]

Looks good!