removed visualize workflows because it is not supported any more

docs/basics.rst

@@ -126,21 +126,6 @@ If a workflow has been added without such a check, it can be checked later with:
 **NOTE:** The correctness check is recommended for all exercises in this tutorial.
 
 
-Visualize workflows
--------------------
-
-Already added workflows can be converted into graphviz DOT format and viewed
-graphically::
-
-    lpad check_wflow -i <firework ID> [-g <controlflow | dataflow | combined>] [-f <filename>]
-
-After the dot file is produced it can be converted to PDF and the workflow graph 
-can be viewed::
-
-    dot -Tpdf -o workflow.pdf workflow.dot
-    evince workflow.pdf
-
-
 Launch fireworks
 ----------------
 
@@ -238,4 +223,4 @@ Then the firework can be rerun.
 
 **NOTE:** Re-running a Firework does not reset any dynamic actions taken by
 that Firework, such as creating new Workflow steps or modifying the *spec*
-of its children.
\ No newline at end of file
+of its children.