Cleanup Py2-3 compat with ImportError

Author: julien-lang

tests/base.py

@@ -16,17 +16,6 @@
 from shotgun_api3.shotgun import ServerCapabilities
 from shotgun_api3.lib import six
 
-try:
-    # Attempt to import skip from unittest.  Since this was added in Python 2.7
-    # in the case that we're running on Python 2.6 we'll need a decorator to
-    # provide some equivalent functionality.
-    from unittest import skip
-except ImportError:
-    # On Python 2.6 we'll just have to ignore tests that are skipped -- we won't
-    # mark them as skipped, but we will not fail on them.
-    def skip(f):
-        return lambda self: None
-
 
 THUMBNAIL_MAX_ATTEMPTS = 30
 THUMBNAIL_RETRY_INTERVAL = 10