Move damage and knockback to hitEntity (#5000)

* Move damge and knockback to `hitEntity`

* b.damage, not damage

core/src/mindustry/entities/comp/BulletComp.java

@@ -93,12 +93,6 @@ abstract class BulletComp implements Timedc, Damagec, Hitboxc, Teamc, Posc, Draw
 
         if(other instanceof Healthc h){
             health = h.health();
-            h.damage(damage);
-        }
-
-        if(other instanceof Unit unit){
-            unit.impulse(Tmp.v3.set(unit).sub(this.x, this.y).nor().scl(type.knockback * 80f));
-            unit.apply(type.status, type.statusDuration);
         }
 
         //must be last.