qemu-char: Drop undocumented chardev "memory" compatibility syntax

This is a new device, so there's no compatibility to maintain, and its
use case isn't common enough to justify shorthand syntax.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-char.c b/qemu-char.c
index 2f59a61..cdbbafe 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2883,11 +2883,6 @@
         qemu_opt_set(opts, "path", filename);
         return opts;
     }
-    if (strstart(filename, "memory", &p)) {
-        qemu_opt_set(opts, "backend", "memory");
-        qemu_opt_set(opts, "maxcapacity", p);
-        return opts;
-    }
     if (strstart(filename, "file:", &p)) {
         qemu_opt_set(opts, "backend", "file");
         qemu_opt_set(opts, "path", p);