More review fixes

Author: StuartFerguson

TransactionProcessor.TransactionAgrgegate/TransactionAggregate.cs

@@ -103,10 +103,7 @@ public static void AddFee(this TransactionAggregate aggregate, CalculatedFee cal
                 throw new InvalidOperationException("Unsupported Fee Type");
             }
 
-            if (@event != null)
-            {
-                aggregate.ApplyAndAppend(@event);
-            }
+            aggregate.ApplyAndAppend(@event);
         }
 
         public static void AddProductDetails(this TransactionAggregate aggregate, Guid contractId,
@@ -160,11 +157,8 @@ public static void AddSettledFee(this TransactionAggregate aggregate, Calculated
             {
                 throw new InvalidOperationException("Unsupported Fee Type");
             }
-
-            if (@event != null)
-            {
-                aggregate.ApplyAndAppend(@event);
-            }
+            
+            aggregate.ApplyAndAppend(@event);
         }
 
         public static void AddTransactionSource(this TransactionAggregate aggregate, TransactionSource transactionSource)

TransactionProcessor.VoucherAggregate/VoucherAggregate.cs

@@ -150,8 +150,7 @@ private static String GenerateVoucherCode(this VoucherAggregate aggregate, Int32
 
         return rdm.Next(min, max).ToString();
     }
-
-    //private static readonly Random _random = new Random();
+    
     private static readonly Random rdm = new Random();
 
     public static void PlayEvent(this VoucherAggregate aggregate, VoucherGeneratedEvent domainEvent)