ccanlint: don't run valgrind tests in test dir.

We changed other tests to run in our tmpdir, missed this one.

tools/ccanlint/tests/run_tests_valgrind.c

@@ -39,15 +39,6 @@ static void *do_run_tests_vg(struct manifest *m,
 	struct run_tests_result *res;
 	struct ccan_file *i;
 	char *cmdout;
-	char *olddir;
-
-	/* We run tests in the module directory, so any paths
-	 * referenced can all be module-local. */
-	olddir = talloc_getcwd(m);
-	if (!olddir)
-		err(1, "Could not save cwd");
-	if (chdir(m->dir) != 0)
-		err(1, "Could not chdir to %s", m->dir);
 
 	list_head_init(list);
 
@@ -82,9 +73,6 @@ static void *do_run_tests_vg(struct manifest *m,
 		list = NULL;
 	}
 
-	if (chdir(olddir) != 0)
-		err(1, "Could not chdir to %s", olddir);
-
 	return list;
 }