Remove duplicated text blocks in debug.md

The exact same text is already included from mail_debug.inc

Author: grinapo

docs/troubleshooting/debug.md

@@ -128,31 +128,6 @@ bt full
 
 <!-- @include: ./include/debug_mail.inc -->
 
-Setting [[setting,log_debug]] will make Dovecot log all kinds of things
-about mailbox initialization. Note that it won't increase error logging
-at all, so if you're having some random problems it's unlikely to provide
-any help.
-
-If there are any problems with a mailbox, Dovecot should automatically fix
-it. If that doesn't work for any reason, you can manually also request
-fixing a mailbox by running [[doveadm,force-resync,-u user@domain INBOX]],
-where `INBOX` should be replaced with the folder that is having problems
-(or `*` if all folders should be fixed).
-
-Users may sometimes complain that they have lost emails. The problem is
-almost always that this was done by one of the user's email clients
-accidentally. Especially accidentally configuring a "POP3 client" to a
-new device that deletes the mails after downloading them.
-
-For this reason it's very useful to enable the [[plugin,mail-log]] and
-enable logging for all the events that may cause mails to be lost. This way
-it's always possible to find out from the logs what exactly caused messages
-to be deleted.
-
-If you're familiar enough with Dovecot's index files, you can use
-[[doveadm,dump]] command to look at their contents in human readable
-format and possibly determine if there is something wrong in them.
-
 ## Rawlogs
 
 See [[link,rawlog]].