Delete the MS_FINALISE mirror state

It's not being used for anything.

src/control.c

@@ -250,7 +250,6 @@ void control_write_mirror_response( enum mirror_state mirror_state, int client_f
 			write_socket( "1: Remote size does not match local size" );
 			break;
 		case MS_GO:
-		case MS_FINALISE:
 		case MS_DONE: /* Yes, I know we know better, but it's simpler this way */
 			write_socket( "0: Mirror started" );
 			break;

src/mirror.c

@@ -386,7 +386,6 @@ void mirror_run( struct server *serve )
 		if (written < mirror_last_pass_after_bytes_written) { break; }
 	}
 
-	mirror_set_state( serve->mirror, MS_FINALISE );
 	server_lock_io( serve );
 	{
 		if ( mirror_pass( serve, 0, &written ) &&

src/mirror.h

@@ -50,7 +50,6 @@ enum mirror_state {
 	MS_UNKNOWN,
 	MS_INIT,
 	MS_GO,
-	MS_FINALISE,
 	MS_DONE,
 	MS_FAIL_CONNECT,
 	MS_FAIL_REJECTED,