removed confusing dead code

Cython/Compiler/ModuleNode.py

@@ -1189,27 +1189,16 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             code.putln(
                     "}")
 
-        # Do not traverse memoryview attributes of memoryview slices
+        # Traverse buffer exporting objects.
+        # Note: not traversing memoryview attributes of memoryview slices!
         # When triggered by the GC, it would cause multiple visits (gc_refs
         # subtractions which is not matched by its reference count!)
-        for entry in py_buffers: # + memoryview_slices:
-            if entry.type == PyrexTypes.c_py_buffer_type:
-                cname = entry.cname + ".obj"
-            else:
-                # traverse the memoryview object, which should traverse the
-                # object exposing the buffer
-                # cname = entry.cname + ".memview"
-                pass
-
+        for entry in py_buffers:
+            cname = entry.cname + ".obj"
             code.putln("if (p->%s) {" % cname)
             code.putln(    "e = (*v)(p->%s, a); if (e) return e;" % cname)
             code.putln("}")
 
-        #if cclass_entry.cname == '__pyx_memoryviewslice':
-        #    code.putln("if (p->from_slice.memview) {")
-        #    code.putln(     "e = (*v)((PyObject *) p->from_slice.memview, a); if (e) return e;")
-        #    code.putln("}")
-
         code.putln(
                 "return 0;")
         code.putln(