drop testing on LPy

IPython/core/tests/test_ultratb.py

@@ -229,6 +229,7 b' except Exception:'
 #----------------------------------------------------------------------------
 
 # module testing (minimal)
+if sys.version_info > (3,):
 def test_handlers():
     def spam(c, d_e):
         (d, e) = d_e
@@ -246,26 +247,26 b' def test_handlers():'
     
     buff = io.StringIO()
 
-    buff.write(u'')
-    buff.write(u'*** Before ***')
+        buff.write('')
+        buff.write('*** Before ***')
     try:
         buff.write(spam(1, (2, 3)))
     except:
         traceback.print_exc(file=buff)
 
     handler = ColorTB(ostream=buff)
-    buff.write(u'*** ColorTB ***')
+        buff.write('*** ColorTB ***')
     try:
         buff.write(spam(1, (2, 3)))
     except:
         handler(*sys.exc_info())
-    buff.write(u'')
+        buff.write('')
 
     handler = VerboseTB(ostream=buff)
-    buff.write(u'*** VerboseTB ***')
+        buff.write('*** VerboseTB ***')
     try:
         buff.write(spam(1, (2, 3)))
     except:
         handler(*sys.exc_info())
-    buff.write(u'')
+        buff.write('')