Bugfix/remove the promise regardless of success or failure (#152)
Bugfix/remove the promise regardless of success or failure (#152)

* Remove the promise regardless of success or failure

* .then(delete, delete) instead of .always(delete)

cornerstonejs/cornerstoneWADOImageLoader,cornerstonejs/cornerstoneWADOImageLoader,chafey/cornerstoneWADOImageLoader,chafey/cornerstoneWADOImageLoader,google/cornerstoneWADOImageLoader,google/cornerstoneWADOImageLoader,cornerstonejs/cornerstoneWADOImageLoader,chafey/cornerstoneWADOImageLoader,google/cornerstoneWADOImageLoader