Revert "Fixup from sebb"

This reverts commit af0c4a74edd8c37515e1107bec0b39701a9987f5.
diff --git a/theme/plugins/asfgenid.py b/theme/plugins/asfgenid.py
index 7a1c8cf..d508675 100644
--- a/theme/plugins/asfgenid.py
+++ b/theme/plugins/asfgenid.py
@@ -40,7 +40,12 @@
 
 # Fixup tuples for HTML that GFM makes into text.
 FIXUP_UNSAFE = [
-    (re.compile(r'&lt;(/?(script|style|iframe))'), '<\1'),
+    (re.compile(r'&lt;script'), '<script'),
+    (re.compile(r'&lt;/script'), '</script'),
+    (re.compile(r'&lt;style'), '<style'),
+    (re.compile(r'&lt;/style'), '</style'),
+    (re.compile(r'&lt;iframe'), '<iframe'),
+    (re.compile(r'&lt;/iframe'), '</iframe')
 ]
 
 # Find {{ metadata }} inclusions