Add link to PDF (#758)

Author: JPryce-Aklundh

modules/ROOT/pages/introduction/index.adoc

@@ -18,31 +18,15 @@ Additionally, https://graphacademy.neo4j.com/[Neo4j GraphAcademy] has a variety
 
 For a reference of all available Cypher features, see the link:{neo4j-docs-base-uri}/cypher-cheat-sheet/{page-version}/[Cypher Cheat Sheet].
 
+For a downloadable PDF version of the Cypher Manual, visit the link:{neo4j-docs-base-uri}/resources/docs-archive/#_cypher_query_language[Neo4j documentation archive].
+
 This introduction will cover the following topics:
 
 * xref:introduction/cypher_overview.adoc[]
 * xref:introduction/cypher_neo4j.adoc[]
 * xref:introduction/cypher_aura.adoc[]
 
 
-////
-TODO: add when new structure of the Manual has been published 
-
-[[structure-content]]
-== Cypher Manual: content and structure
-
-Chapter 1: Clauses
-Chapter 2: Patterns
-Chapter 3: Syntax
-Chapter 4: Values and Types
-Chapter 5: Expressions
-Chapter 6: Functions
-Chapter 7: Procedures
-Chapter 8: Indexes and Constraints
-Chapter 9: Query Profiling
-Chapter 10: Administration
-////
-
 ifndef::backend-pdf[]
 License: link:{common-license-page-uri}[Creative Commons 4.0]
 endif::[]