diff --git a/vcsserver/lib/_vendor/redis_lock/__init__.py b/vcsserver/lib/_vendor/redis_lock/__init__.py
--- a/vcsserver/lib/_vendor/redis_lock/__init__.py
+++ b/vcsserver/lib/_vendor/redis_lock/__init__.py
@@ -23,14 +23,8 @@ loggers = {
     ]
 }
 
-PY3 = sys.version_info[0] == 3
-
-if PY3:
-    text_type = str
-    binary_type = bytes
-else:
-    text_type = unicode  # noqa
-    binary_type = str
+text_type = str
+binary_type = bytes
 
 
 # Check if the id match. If not, return an error code.
diff --git a/vcsserver/lib/_vendor/statsd/timer.py b/vcsserver/lib/_vendor/statsd/timer.py
--- a/vcsserver/lib/_vendor/statsd/timer.py
+++ b/vcsserver/lib/_vendor/statsd/timer.py
@@ -1,14 +1,7 @@
 
 
 import functools
-
-# Use timer that's not susceptible to time of day adjustments.
-try:
-    # perf_counter is only present on Py3.3+
-    from time import perf_counter as time_now
-except ImportError:
-    # fall back to using time
-    from time import time as time_now
+from time import perf_counter as time_now
 
 
 def safe_wraps(wrapper, *args, **kwargs):
diff --git a/vcsserver/lib/rc_cache/utils.py b/vcsserver/lib/rc_cache/utils.py
--- a/vcsserver/lib/rc_cache/utils.py
+++ b/vcsserver/lib/rc_cache/utils.py
@@ -19,6 +19,7 @@ import os
 import time
 import logging
 import functools
+import decorator
 
 from dogpile.cache import CacheRegion
 
@@ -47,61 +48,6 @@ class RhodeCodeCacheRegion(CacheRegion):
         if function_key_generator is None:
             function_key_generator = self.function_key_generator
 
-        # workaround for py2 and cython problems, this block should be removed
-        # once we've migrated to py3
-        if 'cython' == 'cython':
-            def decorator(fn):
-                if to_str is str:
-                    # backwards compatible
-                    key_generator = function_key_generator(namespace, fn)
-                else:
-                    key_generator = function_key_generator(namespace, fn, to_str=to_str)
-
-                @functools.wraps(fn)
-                def decorate(*arg, **kw):
-                    key = key_generator(*arg, **kw)
-
-                    @functools.wraps(fn)
-                    def creator():
-                        return fn(*arg, **kw)
-
-                    if not condition:
-                        return creator()
-
-                    timeout = expiration_time() if expiration_time_is_callable \
-                        else expiration_time
-
-                    return self.get_or_create(key, creator, timeout, should_cache_fn)
-
-                def invalidate(*arg, **kw):
-                    key = key_generator(*arg, **kw)
-                    self.delete(key)
-
-                def set_(value, *arg, **kw):
-                    key = key_generator(*arg, **kw)
-                    self.set(key, value)
-
-                def get(*arg, **kw):
-                    key = key_generator(*arg, **kw)
-                    return self.get(key)
-
-                def refresh(*arg, **kw):
-                    key = key_generator(*arg, **kw)
-                    value = fn(*arg, **kw)
-                    self.set(key, value)
-                    return value
-
-                decorate.set = set_
-                decorate.invalidate = invalidate
-                decorate.refresh = refresh
-                decorate.get = get
-                decorate.original = fn
-                decorate.key_generator = key_generator
-                decorate.__wrapped__ = fn
-
-                return decorate
-            return decorator
-
         def get_or_create_for_user_func(key_generator, user_func, *arg, **kw):
 
             if not condition: