Holding a spear in the off hand and attacking an entity adds the spear's attack damage to the attack

The Bug

Currently, the spear applies its weapon modifier for attack damage in both hands, meaning that if you were to, say, put a spear in your off hand, it would deal extra damage. This would not apply if the main hand weapon was a sword (as an example) most of the time since the modifiers conflict.

Steps to reproduce the issue

Step 1. Hold a netherite spear

Step 2. Swap it to the off-hand

Step 3. Attack an entity with your fist

Step 4. Notice it does 5 damage to the entity

Expected result

The fist should deal 1 damage in spite of the spear being in the off-hand

Actual result

The fist does 5 damage to the entity