disable ipy_signals in sh profile, it does not work with python 2.3 (that has no subprocess module)

IPython/Extensions/ipy_profile_sh.py

@@ -43,7 +43,9 b' def main():'
     # %store foo
     # %store bar
     import ipy_rehashdir
-    import ipy_signals
+
+    # does not work without subprocess module!
+    #import ipy_signals
     
     ip.ex('import os')
     ip.ex("def up(): os.chdir('..')")