Remove redundant property from ImageRequest

Summary:
Changelog: [internal]

`moved_`, introduced in D8526571 (https://github.com/facebook/react-native/commit/979ea2094e74ae8da0288fd5038f1f2838bd7763), no longer servers its purpose.
Let's remove it.

Reviewed By: JoshuaGross

Differential Revision: D24475715

fbshipit-source-id: 162d1fc4ed3d4a67885d8f140904dd80763dcaa0

ReactCommon/react/renderer/imagemanager/ImageRequest.h

@@ -96,11 +96,6 @@ class ImageRequest final {
    * Function we can call to cancel image request (see destructor).
    */
   std::function<void(void)> cancelRequest_;
-
-  /*
-   * Indicates that the object was moved and hence cannot be used anymore.
-   */
-  bool moved_{false};
 };
 
 } // namespace react

ReactCommon/react/renderer/imagemanager/platform/ios/ImageRequest.cpp

@@ -21,7 +21,6 @@ ImageRequest::ImageRequest(ImageRequest &&other) noexcept
     : imageSource_(std::move(other.imageSource_)),
       telemetry_(std::move(other.telemetry_)),
       coordinator_(std::move(other.coordinator_)) {
-  other.moved_ = true;
   other.coordinator_ = nullptr;
   other.cancelRequest_ = nullptr;
   other.telemetry_ = nullptr;