move Python < 2.6 fallback into _markerlib

--HG--
branch : distribute
extra : rebase_source : 901265cef35594b3ab20ae4ba3b270a5da6f9ea7

1 files changed, 1 insertions, 10 deletions

diff --git a/pkg_resources.py b/pkg_resources.py
index 060db644..a5a10eb4 100644
--- a/pkg_resources.py
+++ b/pkg_resources.py
@@ -2482,16 +2482,7 @@ class DistInfoDistribution(Distribution):
             
     def _compute_dependencies(self):
         """Recompute this distribution's dependencies."""
-        def dummy_marker(marker):
-            def marker_fn(environment=None, override=None):
-                # 'empty markers are True' heuristic won't install extra deps.
-                return not marker.strip()
-            marker_fn.__doc__ = marker
-            return marker_fn
-        try:
-            from _markerlib import compile as compile_marker
-        except ImportError:
-            compile_marker = dummy_marker
+        from _markerlib import compile as compile_marker
         dm = self.__dep_map = {None: []}
 
         reqs = []