Clean up all projectile code.

Projectiles/RainbowDemon/RainbowDemonMagicBall.cs

@@ -8,8 +8,6 @@ namespace FabusMod.Projectiles.RainbowDemon;
 
 public class RainbowDemonMagicBall : ModProjectile
 {
-	private const int alphaReducation = 25;
-
 	public override void SetDefaults()
 	{
 		Projectile.width = 10;
@@ -27,28 +25,26 @@ public class RainbowDemonMagicBall : ModProjectile
 	{
 		if (Utils.NextFloat(Main.rand) < 0.1f && Projectile.alpha <= 100)
 		{
-			int dust1 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust>(), 0f, 0f, 0, default, 1f);
-			int dust2 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust2>(), 0f, 0f, 0, default, 1f);
-			int dust3 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust3>(), 0f, 0f, 0, default, 1f);
+			int dust1 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust>());
 			Main.dust[dust1].scale = 0.9f;
-			Dust obj = Main.dust[dust1];
-			obj.velocity *= 0.1f;
+			Main.dust[dust1].velocity *= 0.1f;
 			Main.dust[dust1].noGravity = true;
+
+			int dust2 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust2>());
 			Main.dust[dust2].scale = 0.9f;
-			Dust obj2 = Main.dust[dust2];
-			obj2.velocity *= 0.1f;
+			Main.dust[dust2].velocity *= 0.1f;
 			Main.dust[dust2].noGravity = true;
+
+			int dust3 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.RainbowDust3>());
 			Main.dust[dust3].scale = 0.9f;
-			Dust obj3 = Main.dust[dust3];
-			obj3.velocity *= 0.1f;
+			Main.dust[dust3].velocity *= 0.1f;
 			Main.dust[dust3].noGravity = true;
 		}
 	}
 
 	public override bool OnTileCollide(Vector2 oldVelocity)
 	{
-		Projectile projectile = Projectile;
-		projectile.penetrate--;
+		Projectile.penetrate--;
 		if (Projectile.penetrate <= 0)
 		{
 			Projectile.Kill();
@@ -64,8 +60,7 @@ public class RainbowDemonMagicBall : ModProjectile
 			{
 				Projectile.velocity.Y = 0f - oldVelocity.Y;
 			}
-			Projectile projectile2 = Projectile;
-            projectile2.velocity = projectile2.velocity * 0.75f;
+            Projectile.velocity *= 0.75f;
 			SoundEngine.PlaySound(SoundID.Item27, Projectile.position);
 		}
 		return false;