message: Update docstrings in presto.py
diff: @@ -235,7 +235,6 @@ class PrestoEngineSpec(BaseEngineSpec): # pylint: disable=too-many-public-metho
  that can set the correct properties for impersonating users
  :param connect_args: config to be updated
  :param uri: URI string
  - :param impersonate_user: Flag indicating if impersonation is enabled
  :param username: Effective username
  :return: None
  """
  @@ -661,9 +660,7 @@ class PrestoEngineSpec(BaseEngineSpec): # pylint: disable=too-many-public-metho
  Run a SQL query that estimates the cost of a given statement.
  :param statement: A single SQL statement
  - :param database: Database instance
  :param cursor: Cursor instance
  - :param username: Effective username
  :return: JSON response from Presto
  """
  sql = f"EXPLAIN (TYPE IO, FORMAT JSON) {statement}"
  