Refactor: Inline method

Author: mikybars

exercises/tiered_pricing/solutions/mperezi/src/main/java/tv/codely/checkout/TieredPricing.java

@@ -28,10 +28,6 @@ static Tier of(int subscriptions) {
   }
 
   public double totalPrice(int subscriptions) {
-    return subscriptions * getTier(subscriptions).unitPrice;
-  }
-
-  private Tier getTier(int subscriptions) {
-    return Tier.of(subscriptions);
+    return subscriptions * Tier.of(subscriptions).unitPrice;
   }
 }