Remove outdated comment

Dandandan · Dandandan · commit b45d2275d043 · 2020-07-17T07:52:51.000+02:00
diff --git a/src/ast/mod.rs b/src/ast/mod.rs
@@ -555,7 +555,6 @@ pub enum Statement {
     /// ASSERT <condition> [AS <message>]
     Assert {
         condition: Expr,
-        // AS or ,
         message: Option<Expr>,
     },
 }
