remove double Using

Author: JPryce-Aklundh

modules/ROOT/pages/queries/composed-queries/sequential-queries.adoc

@@ -250,7 +250,7 @@ The third segment aggregates the personality types.
 Finally, the fourth segment is another conditional query which subsumes multiple base personality types, if present, to a new personality.
 
 [[next-conditional-queries-top-level-braces]]
-=== Using `NEXT` inside a conditional query using `{}`
+=== `NEXT` inside a conditional query using `{}`
 
 If a conditional query has a `NEXT` in any of its `THEN` or `ELSE` blocks, it is necessary to wrap the part after `THEN` or `ELSE` with `{}`.
 
@@ -331,7 +331,7 @@ The second segment can access the list, because both parts of the `UNION` return
 By using xref:functions/aggregating.adoc#functions-count[`count()`], the list aggregates the duplicate in the `RETURN` part of the query.
 
 
-=== Using `NEXT` inside a `UNION` using `{}`
+=== `NEXT` inside a `UNION` using `{}`
 
 If a `UNION` query has a `NEXT` in any of its blocks, it is necessary to wrap that block with `{}`.