Drop 1.0.0 (#3312)

* delete the 1.0.0 support

* drop the version check

* drop the AES-CTR stuff

* Update the example

* openssl truncates for us now

* delete unused test

* unused imports

* Remove a bunch of conditional bindings for NPN

* no more 1.0.0 builders

* libressl fix

* update the docs

* remove dead branches

* oops

* this is a word, damnit

* spelling

* try removing this

* this test is not needed

* unused import
diff --git a/docs/hazmat/backends/openssl.rst b/docs/hazmat/backends/openssl.rst
index f97ec57..e293c06 100644
--- a/docs/hazmat/backends/openssl.rst
+++ b/docs/hazmat/backends/openssl.rst
@@ -3,7 +3,7 @@
 OpenSSL backend
 ===============
 
-The `OpenSSL`_ C library. Cryptography supports OpenSSL version ``1.0.0`` and
+The `OpenSSL`_ C library. Cryptography supports OpenSSL version 1.0.1 and
 greater.
 
 .. data:: cryptography.hazmat.backends.openssl.backend