Revert "Make flare gun explode, damage and stun the player when used … (#24679)

Revert "Make flare gun explode, damage and stun the player when used … (#24679)

* Revert "Make flare gun explode, damage and stun the player when used with the wrong ammo (#22349)"

This reverts commit e301378114b245fa6927372f83c19868cb90b13c.

# Conflicts:
#	Content.Shared/Weapons/Ranged/Components/GunComponent.cs
#	Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/shotgun.yml
#	Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml

* Fix revert conflicts

* Update Content.Shared/Weapons/Ranged/Components/GunComponent.cs