clean up filenotfound error in logs during `cfn submit`

[mmaeng]

Exception for path not being found during cfn submit is needlessly cluttering logs

[2022-10-21T01:48:21Z] DEBUG    - Package started
[2022-10-21T01:48:21Z] DEBUG    - '/home/mmaeng/source/test-mod/build' not found, skipping removal
Traceback (most recent call last):
  File "/home/mmaeng/source/cloudformation-cli/.venv/lib/python3.8/site-packages/rpdk/typescript/codegen.py", line 226, in _remove_build_artifacts
    shutil.rmtree(deps_path)
  File "/usr/lib/python3.8/shutil.py", line 709, in rmtree
    onerror(os.lstat, path, sys.exc_info())
  File "/usr/lib/python3.8/shutil.py", line 707, in rmtree
    orig_st = os.lstat(path)
FileNotFoundError: [Errno 2] No such file or directory: '/home/mmaeng/source/test-mod/build'