Clean up all projectile code.

Projectiles/SorcerousStaff/SorcerousStaffProj.cs

@@ -42,8 +42,7 @@ public class SorcerousStaffProj : ModProjectile
 
 	public override bool OnTileCollide(Vector2 oldVelocity)
 	{
-		Projectile projectile = Projectile;
-		projectile.penetrate--;
+		Projectile.penetrate--;
 		if (Projectile.penetrate <= 0)
 		{
 			Projectile.Kill();
@@ -59,8 +58,7 @@ public class SorcerousStaffProj : ModProjectile
 			{
 				Projectile.velocity.Y = 0f - oldVelocity.Y;
 			}
-			Projectile projectile2 = Projectile;
-            projectile2.velocity *= 0.75f;
+			Projectile.velocity *= 0.75f;
 			SoundEngine.PlaySound(SoundID.Item27, Projectile.position);
 		}
 		return false;
@@ -70,11 +68,10 @@ public class SorcerousStaffProj : ModProjectile
 	{
 		for (int i = 0; i < 5; i++)
 		{
-			int dust1 = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.SorcerousDust>(), 0f, 0f, 0, default, 1f);
-			Main.dust[dust1].scale = 0.9f;
-			Dust obj = Main.dust[dust1];
-			obj.velocity *= 0.1f;
-			Main.dust[dust1].noGravity = true;
+			int dust = Dust.NewDust(Projectile.position, Projectile.width, Projectile.height, ModContent.DustType<Dusts.SorcerousDust>());
+			Main.dust[dust].scale = 0.9f;
+			Main.dust[dust].velocity *= 0.1f;
+			Main.dust[dust].noGravity = true;
 		}
 		SoundEngine.PlaySound(SoundID.Item27, Projectile.position);
 	}