Removed note on test_time failing.

Bugfix candidate.

Mac/ReadMe

@@ -140,9 +140,6 @@ Python and "import test.regrtest ; test.regrtest.main()".
 test_frozen will fail in MacPython because of different handling on
 frozen modules. This should not be a problem in normal use.
 
-test_time will fail because MacPython accepts bogus values for
-mktime(), this will be fixed later (it is not a very serious problem).
-
 Three tests will fail on MacOS9 with MemoryErrors:
 test_longexp, test_sha and test_zlib (on MacOSX these should pass).