Don't test semantic test in mode "all" for now

mjtest/cli.py

@@ -78,7 +78,7 @@ if True:#__name__ == '__main__':
             count += ret.count
     if args["mode"] == "all":
         report_subdir = datetime.now().strftime("%d-%m-%y_%H-%M-%S")
-        for mode in TEST_MODES:
+        for mode in [TestMode.lexer, TestMode.syntax, TestMode.ast]:
             args["report_subdir"] = report_subdir + "_" + mode
             cprint("Run {} tests".format(mode), attrs=["bold"])
             args["mode"] = mode