do not throw exception if there is a wrong folder

src/main/java/org/bioimageanalysis/icy/deeplearning/versionmanager/version/AvailableDeepLearningVersions.java

@@ -256,8 +256,6 @@ public class AvailableDeepLearningVersions
 					try {
 						return DeepLearningVersion.fromString(t);
 					} catch (Exception e) {
-						// TODO print stack trace??
-						e.printStackTrace();
 						System.out.println("");
 						System.out.println("Folder '" + new File(t).getName() + "' does not contain a supported Deep Learning engine version");
 						return null;