Made a sphinx extension which emits the hazardous materials danger admonition
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index 9a5bce0..1e047b7 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -1,8 +1,4 @@
-.. danger::
-
- This is a "Hazardous Materials" module. You should **ONLY** use it if
- you're 100% absolutely sure that you know what you're doing because this
- module is full of land mines, dragons, and dinosaurs with laser guns.
+.. hazmat::
Symmetric Encryption