Remove orphan documentation pages

diff --git a/doc/readme.md b/doc/readme.md
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-Friendica Documentation and Resources
-=====================================
-
-**Contents**
-
-* General functions - first steps
-       * [Account Basics](help/Account-Basics)
-       * [New User Quick Start](help/Quick-Start-guide)
-       * [Creating posts](help/Text_editor)
-        * [BBCode tag reference](help/BBCode)
-       * [Comment, sort and delete posts](help/Text_comment)
-       * [Profiles](help/Profiles)
-* You and other user
-       * [Connectors](help/Connectors)
-       * [Making Friends](help/Making-Friends)
-       * [Groups and Privacy](help/Groups-and-Privacy)
-       * [Tags and Mentions](help/Tags-and-Mentions)
-       * [Community Forums](help/Forums)
-       * [Chats](help/Chats)
-* Further information
-       * [Improve Performance](help/Improve-Performance)
-       * [Move Account](help/Move-Account)
-       * [Remove Account](help/Remove-Account)
-       * [Bugs and Issues](help/Bugs-and-Issues)
-       * [Frequently asked questions (FAQ)](help/FAQ)
-
-**Technical Documentation**
-
-* [Install](help/Install)
-* [Settings & Admin Panel](help/Settings)
-* [Plugins](help/Plugins)
-* [Installing Connectors (Twitter/GNU Social)](help/Installing-Connectors)
-* [Install an ejabberd server (XMPP chat) with synchronized credentials](help/install-ejabberd)
-* [Message Flow](help/Message-Flow)
-* [Using SSL with Friendica](help/SSL)
-* [Developers](help/Developers)
-* [Twitter/GNU Social API Functions](help/api)
-* [Translation of Friendica](help/translations)
-
-
-**External Resources**
-
-* [Main Website](https://friendi.ca)
-* [Mailing List Archive](http://librelist.com/browser/friendica/)
-
-**About**
-
-* [Site/Version Info](friendica)
-

diff --git a/doc/upgrade.md b/doc/upgrade.md
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-# Considerations before upgrading Friendica
-
-* [Home](help)
-
-## MySQL >= 5.7.4
-
-Starting from MySQL version 5.7.4, the IGNORE keyword in ALTER TABLE statements is ignored.
-This prevents automatic table deduplication if a UNIQUE index is added to a Friendica table's structure.
-If a DB update fails for you while creating a UNIQUE index, make sure to manually deduplicate the table before trying the update again.
-
-### Manual deduplication
-
-There are two main ways of doing it, either by manually removing the duplicates or by recreating the table.
-Manually removing the duplicates is usually faster if they're not too numerous.
-To manually remove the duplicates, you need to know the UNIQUE index columns available in `database.sql`.
-
-```SQL
-SELECT GROUP_CONCAT(id), <index columns>, count(*) as count FROM users
-GROUP BY <index columns> HAVING count >= 2;
-
-/* delete or merge duplicate from above query */;
-```
-
-If there are too many rows to handle manually, you can create a new table with the same structure as the table with duplicates and insert the existing content with INSERT IGNORE.
-To recreate the table you need to know the table structure available in `database.sql`.
-
-```SQL
-CREATE TABLE <table_name>_new <rest of the CREATE TABLE>;
-INSERT IGNORE INTO <table_name>_new SELECT * FROM <table_name>;
-DROP TABLE <table_name>;
-RENAME TABLE <table_name>_new TO <table_name>;
-```
-
-This method is slower overall, but it is better suited for large numbers of duplicates.
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