[cpp, combat] Fix Ranged Weapon Rank Calculations

[9001-Sols]

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What does this pull request do?

Fixes the Weapon Rank calculation for Ranged weapons to use only the Ranged Weapon, instead of Ranged Weapon + Ammo

Steps to test these changes

• Equip Yoichinoyumi and Demon Arrow and confirm weapon rank is only 9
• Equip Annihilator and Silver Bullet and confirm weapon rank is only 5
• Or more broadly, make sure Weapon Rank is floor(RANGE_WEAPON_DMG / 9) and doesn't include ammo (unless the throwable is an ammo, in which case it uses the throwable damage)

Before (Yoichinoyumi + Annihilator)	After (Yoichinoyumi + Annihilator)

[9001-Sols]

Now that we just read the weapon damage directly for calculations, we don't need to subtract out the mod