diff --git a/oslo/version/version.py b/oslo/version/version.py
index 9327af4..70077a6 100644
--- a/oslo/version/version.py
+++ b/oslo/version/version.py
@@ -257,20 +257,3 @@ class VersionInfo(object):
     def suffix_string(self):
         self._load_vendor_strings()
         return self.suffix
-
-    # Compatibility functions
-    canonical_version_string = version_string
-    version_string_with_vcs = release_string
-    package_string = suffix_string
-
-    def cached_version_string(self, prefix=""):
-        """Generate an object which will expand in a string context to
-        the results of version_string(). We do this so that don't
-        call into pkg_resources every time we start up a program when
-        passing version information into the CONF constructor, but
-        rather only do the calculation when and if a version is requested
-        """
-        if not self._cached_version:
-            self._cached_version = "%s%s" % (prefix,
-                                             self.version_string())
-        return self._cached_version
diff --git a/tests/test_version.py b/tests/test_version.py
index 031302e..9ab9e89 100644
--- a/tests/test_version.py
+++ b/tests/test_version.py
@@ -23,18 +23,6 @@ from oslo.version import version
 import tests
 
 
-class DeferredVersionTestCase(tests.BaseTestCase):
-
-    def test_cached_version(self):
-        class MyVersionInfo(version.VersionInfo):
-            def _get_version_from_pkg_resources(self):
-                return "5.5.5.5"
-
-        deferred_string = MyVersionInfo("openstack").\
-            cached_version_string()
-        self.assertEqual("5.5.5.5", deferred_string)
-
-
 class FindConfigFilesTestCase(tests.BaseTestCase):
 
     def _monkey_patch(self, config_files):