submodule: remove a superfluous second check for the "new" variable

Signed-off-by: Sebastian Schuberth <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: sschuberth

submodule.c

@@ -1362,8 +1362,7 @@ int submodule_move_head(const char *path,
 			cp1.no_stdin = 1;
 			cp1.dir = path;
 
-			argv_array_pushl(&cp1.args, "update-ref", "HEAD",
-					 new ? new : EMPTY_TREE_SHA1_HEX, NULL);
+			argv_array_pushl(&cp1.args, "update-ref", "HEAD", new, NULL);
 
 			if (run_command(&cp1)) {
 				ret = -1;