class_docstr: Represents an environment variable.
code: def unset(self):
      os.environ.pop(self.name, None)
  
file_path: mlflow/mlflow/environment_variables.py
imports: import os
  from pathlib import Path
label_desc: Use image node_id 5 for calling the _EnvironmentVariable obj's underlying member method code with example usage: obj.unset() without return types