1 files changed, 4 insertions, 25 deletions
diff --git a/src/cryptography/hazmat/primitives/constant_time.py b/src/cryptography/hazmat/primitives/constant_time.py
index 35ceafe0..7f41b9ef 100644
--- a/src/cryptography/hazmat/primitives/constant_time.py
+++ b/src/cryptography/hazmat/primitives/constant_time.py
@@ -5,31 +5,10 @@
 from __future__ import absolute_import, division, print_function
 
 import hmac
-import warnings
 
-from cryptography import utils
-from cryptography.hazmat.bindings._constant_time import lib
 
+def bytes_eq(a, b):
+    if not isinstance(a, bytes) or not isinstance(b, bytes):
+        raise TypeError("a and b must be bytes.")
 
-if hasattr(hmac, "compare_digest"):
-    def bytes_eq(a, b):
-        if not isinstance(a, bytes) or not isinstance(b, bytes):
-            raise TypeError("a and b must be bytes.")
-
-        return hmac.compare_digest(a, b)
-
-else:
-    warnings.warn(
-        "Support for your Python version is deprecated. The next version of "
-        "cryptography will remove support. Please upgrade to a release "
-        "(2.7.7+) that supports hmac.compare_digest as soon as possible.",
-        utils.PersistentlyDeprecated2018,
-    )
-
-    def bytes_eq(a, b):
-        if not isinstance(a, bytes) or not isinstance(b, bytes):
-            raise TypeError("a and b must be bytes.")
-
-        return lib.Cryptography_constant_time_bytes_eq(
-            a, len(a), b, len(b)
-        ) == 1
+    return hmac.compare_digest(a, b)