d (Delete) command
Deletes files from archive.
Example
7z d archive.zip *.bak -r
deletes *.bak files from archive archive.zip.
Switches that can be used with this command
-i (Include)
-m (Method)
-p (Set Password)
-r (Recurse)
-u (Update)
-w (Working Dir)
-x (Exclude)
See also
Commands: a (Add), u (Update)
Switches: -u (Update)