Remove patterns pages (#508) (#509)

Author: lidiazuin

modules/ROOT/content-nav.adoc

@@ -8,8 +8,6 @@
 * xref:cypher/index.adoc[What is Cypher]
 ** xref:cypher/intro-tutorial.adoc[Get started with Cypher]
 ** xref:cypher/cypher-sql.adoc[]
-** xref:cypher/patterns.adoc[]
-** xref:cypher/patterns-in-practice.adoc[]
 ** xref:cypher/results.adoc[]
 ** xref:cypher/updating.adoc[]
 ** xref:cypher/large-statements.adoc[]

modules/ROOT/pages/cypher/intro-tutorial.adoc

@@ -752,7 +752,7 @@ For the first query, the result is "Joe Versus the Volcano", and for the second:
 == Find patterns
 
 In the previous step, you queried the graph for nodes.
-Now you are going to retrieve related nodes by finding the xref:cypher/patterns.adoc[patterns] within the graph, that is, how these nodes are related to each other.
+Now you are going to retrieve related nodes by finding the link:https://neo4j.com/docs/cypher-manual/current/patterns/[patterns] within the graph, that is, how these nodes are related to each other.
 
 === All Tom Hanks movies