code: def test_remote_modify_unset(dvc):
      assert (
          main(
              ["remote", "add", "-d", "myremote", "gdrive://test/test"]
          )
          == 0
      )
      config = configobj.ConfigObj(dvc.config.files["repo"])
      assert config['remote "myremote"'] == {
          "url": "gdrive://test/test"
      }
  
      assert (
          main(
              [
                  "remote",
                  "modify",
                  "myremote",
                  "gdrive_client_id",
                  "something",
              ]
          )
          == 0
      )
      config = configobj.ConfigObj(dvc.config.files["repo"])
      assert config['remote "myremote"'] == {
          "url": "gdrive://test/test",
          "gdrive_client_id": "something",
      }
  
      assert (
          main(
              [
                  "remote",
                  "modify",
                  "myremote",
                  "gdrive_client_id",
                  "--unset",
              ]
          )
          == 0
      )
      config = configobj.ConfigObj(dvc.config.files["repo"])
      assert config['remote "myremote"'] == {
          "url": "gdrive://test/test"
      }
  
imports: import errno
  import itertools
  import os
  import stat
  import configobj
  import pytest
  from dvc.cli import main
  from dvc.config import Config
  from dvc.exceptions import DownloadError, UploadError
  from dvc.utils.fs import remove
label_desc: Use image node_id 17 for calling a global function with example usage: test_remote_modify_unset(dvc) without return types