man: doveadm-import - Remove the --no-userdb-lookup form

This is a special case that shouldn't be necessary to use.

Author: sirainen

docs/core/man/doveadm-import.1.md

@@ -21,12 +21,6 @@ dovecotComponent: core
   [**-s**]
   **-F** *file* *source_mail_driver*:*source_mail_path*
 
-**doveadm** [*GLOBAL OPTIONS*] **import**
-  [**-S** *socket_path*]
-  [**-U** *source_user*]
-  [**-s**]
-  **\-\-no-userdb-lookup** *source_mail_driver*:*source_mail_path*
-
 **doveadm** [*GLOBAL OPTIONS*] **import**
   [**-S** *socket_path*]
   [**-U** *source_user*]
@@ -48,9 +42,6 @@ In the first form, the mails will be imported for all users.
 In the second form, the mails will be imported for all users listed in
 the given *file*.
 
-In the third form, the command will be performed for the user contained in the
-*USER* environment variable.
-
 In the final form, the mails will be imported only for given *user* (s).
 
 <!-- @include: include/global-options.inc -->