Final answer:
Removing CO₂ from the equation will cause the equilibrium to shift to the left.
Step-by-step explanation:
When we remove CO₂ from the equation CO + H₂O + heat → CO₂ + H₂, the equilibrium will shift to the left. Removing a product from the equation will cause the reaction to produce more of that product to restore equilibrium. So, by removing CO₂, the reaction will shift in the opposite direction to produce more CO.