remove duplicate replace tags

Author: JPryce-Aklundh

modules/ROOT/pages/functions/string.adoc

@@ -365,12 +365,10 @@ RETURN replace("hello", "l", "w")
 |===
 
 .Query with limit
-// tag::functions_string_replace[]
 [source, cypher, indent=0]
 ----
 RETURN replace("hello", "l", "w", 1)
 ----
-// end::functions_string_replace[]
 
 .Result
 [role="queryresult",options="header,footer",cols="1*<m"]