Delete dead code and update a comment (#3529)
diff --git a/src/_cffi_src/openssl/osrandom_engine.py b/src/_cffi_src/openssl/osrandom_engine.py
index 10c5a60..93af8cf 100644
--- a/src/_cffi_src/openssl/osrandom_engine.py
+++ b/src/_cffi_src/openssl/osrandom_engine.py
@@ -25,5 +25,3 @@
with open(os.path.join(HERE, "src/osrandom_engine.c")) as f:
CUSTOMIZATIONS = f.read()
-
-CONDITIONAL_NAMES = {}
diff --git a/src/cryptography/hazmat/bindings/openssl/_conditional.py b/src/cryptography/hazmat/bindings/openssl/_conditional.py
index 8605477..11e329e 100644
--- a/src/cryptography/hazmat/bindings/openssl/_conditional.py
+++ b/src/cryptography/hazmat/bindings/openssl/_conditional.py
@@ -4,9 +4,9 @@
from __future__ import absolute_import, division, print_function
-# This is a temporary copy of all the CONDITIONAL_NAMES from _cffi_src so
-# we can loop over them and delete them at runtime. It will be removed when
-# cffi supports #if in cdef
+# This is a mapping of {condition: names-dependent-on-that-condition} so we can
+# loop over them and delete unsupported names at runtime. It will be removed
+# when cffi supports #if in cdef.
CONDITIONAL_NAMES = {
"Cryptography_HAS_CMS": [