remove a few more obsolete twisted notes

IPython/testing/iptest.py

@@ -415,9 +415,6 b' def run_iptest():'
 
     argv = sys.argv + [ '--detailed-errors',  # extra info in tracebacks
 
-                        # Loading ipdoctest causes problems with Twisted, but
-                        # our test suite runner now separates things and runs
-                        # all Twisted tests with trial.
                         '--with-ipdoctest',
                         '--ipdoctest-tests','--ipdoctest-extension=txt',
 
@@ -456,7 +453,7 b' def run_iptestall():'
     This function constructs :class:`IPTester` instances for all IPython
     modules and package and then runs each of them.  This causes the modules
     and packages of IPython to be tested each in their own subprocess using
-    nose or twisted.trial appropriately.
+    nose.
     """
 
     runners = make_runners()

IPython/testing/tools.py

@@ -1,14 +1,9 b''
-"""Generic testing tools that do NOT depend on Twisted.
+"""Generic testing tools.
 
 In particular, this module exposes a set of top-level assert* functions that
 can be used in place of nose.tools.assert* in method generators (the ones in
 nose can not, at least as of nose 0.10.4).
 
-Note: our testing package contains testing.util, which does depend on Twisted
-and provides utilities for tests that manage Deferreds.  All testing support
-tools that only depend on nose, IPython or the standard library should go here
-instead.
-
 
 Authors
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