qemu-img: fix usage instruction for qemu-img convert

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/qemu-img.c b/qemu-img.c
index 9d1b6b5..9fe0ede 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -110,7 +110,6 @@
            "       conversion. If the number of bytes is 0, the source will not be scanned for\n"
            "       unallocated or zero sectors, and the destination image will always be\n"
            "       fully allocated\n"
-           "       images will always be fully allocated\n"
            "  '--output' takes the format in which the output must be done (human or json)\n"
            "  '-n' skips the target volume creation (useful if the volume is created\n"
            "       prior to running qemu-img)\n"