еще правки лабы 7

Sailboat/Sailboat/BoatsGenericCollection.cs

@@ -74,10 +74,7 @@ namespace Sailboat.Generics
         public static T? operator -(BoatsGenericCollection<T, U> collect, int pos)
         {
             T? obj = collect._collection[pos];
-            if (obj != null)
-            {
-                collect._collection.Remove(pos);
-            }
+            collect._collection.Remove(pos);
             return obj;
         }
 

Sailboat/Sailboat/SetGeneric.cs

@@ -48,11 +48,6 @@ namespace Sailboat.Generics
         /// <returns></returns>
         public bool Insert(T boat, int position)
         {
-            if (boat == null)
-            {
-                throw new ArgumentNullException(nameof(boat));
-            }
-
             if (position < 0 || position >= _maxCount)
                 throw new BoatNotFoundException(position);