Revert

examples/chef/chef.py

@@ -24,6 +24,7 @@
 import hashlib
 import json
 import tarfile
+import subprocess
 
 import constants
 import stateful_shell
@@ -272,7 +273,7 @@ def main(argv: Sequence[str]) -> None:
             if device_dir_item.endswith(target_file_ext) and device_dir_item in chef_util.ci_allowlist:
                 device_name = device_dir_item[:-len(target_file_ext)]
                 command = './chef.py -cbr --use_zzz -d {} -t {}'.format(device_name, options.build_target)
-                shell.run_cmd(command)
+                subprocess.check_call(command, cwd=_CHEF_SCRIPT_PATH, shell=True)
         exit(0)
 
     #
@@ -291,7 +292,7 @@ def main(argv: Sequence[str]) -> None:
                     output_dir = os.path.join(_CHEF_SCRIPT_PATH, directory)
                     command = './chef.py -czbr -d {} -t {}'.format(device_name, platform)
                     print(f"Building {command}")
-                    shell.run_cmd(command)
+                    subprocess.check_call(command, cwd=_CHEF_SCRIPT_PATH, shell=True)
                     archive_prefix = "/workspace/artifacts/"
                     if not os.path.exists(archive_prefix):
                         os.mkdir(archive_prefix)