Do not declare destructor as default when destructor is explicitly declared. (#732)

samples/client/petstore/cpp-restsdk/api/PetApi.h

@@ -43,7 +43,7 @@ public:
 
     explicit PetApi( std::shared_ptr<ApiClient> apiClient );
 
-    virtual ~PetApi() = default;
+    virtual ~PetApi();
 
     /// <summary>
     /// Add a new pet to the store

samples/client/petstore/cpp-restsdk/api/StoreApi.h

@@ -42,7 +42,7 @@ public:
 
     explicit StoreApi( std::shared_ptr<ApiClient> apiClient );
 
-    virtual ~StoreApi() = default;
+    virtual ~StoreApi();
 
     /// <summary>
     /// Delete purchase order by ID

samples/client/petstore/cpp-restsdk/api/UserApi.h

@@ -42,7 +42,7 @@ public:
 
     explicit UserApi( std::shared_ptr<ApiClient> apiClient );
 
-    virtual ~UserApi() = default;
+    virtual ~UserApi();
 
     /// <summary>
     /// Create user