SSDM-3543 : V3 AS API - improve context information in exceptions -...

SSDM-3543 : V3 AS API - improve context information in exceptions - ProgressStack iterator remove method

SVN: 36549

openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/context/ProgressStack.java

@@ -60,8 +60,8 @@ class ProgressStack implements IProgressStack
                 @Override
                 public void remove()
                 {
+                    throw new UnsupportedOperationException();
                 }
-
             };
     }