docs: remove outdated permalink example

ulivz · ulivz · commit 8abd976aa7c2 · 2018-10-08T01:27:52.000+08:00
diff --git a/packages/docs/docs/guide/assets.md b/packages/docs/docs/guide/assets.md
@@ -1,8 +1,3 @@
----
-permalink: :year/:month/:day/:slug
-date: 2018-08-15 11:22:33
----
-
 # Asset Handling
 
 ## Relative URLs
