After takeoff/climb checklist:
Landing gear - up
Flaps - retracted
Packs - on
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Baro reference - STD set
That's the Airbus version of it, as far as I am aware. Everything else, including removing this section, is an airline-specific customisation. And that's the trap with deleting it - probably because whoever designed the SOP and checklist thought that raising the gear was too intuitive to forget.