old_contents: """
  byceps.util.datetime.timezone
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  Timezone helpers
  
  :Copyright: 2006-2021 Jochen Kupperschmidt
  :License: Revised BSD (see `LICENSE` file for details)
  """
  
  from datetime import datetime
  
  from flask import current_app
  import pendulum
  
  
  
  def local_tz_to_utc(dt: datetime):
      """Convert date/time object from configured default local time to UTC."""
      tz_str = get_timezone_string()
  
      return (pendulum.instance(dt)
          .set(tz=tz_str)
          .in_tz(pendulum.UTC)
          # Keep SQLAlchemy from converting it to another zone.
          .replace(tzinfo=None))
  
  
  def utc_to_local_tz(dt: datetime) -> datetime:
      """Convert naive date/time object from UTC to configured time zone."""
      tz_str = get_timezone_string()
      return pendulum.instance(dt).in_tz(tz_str)
  
  
  def get_timezone_string() -> str:
      """Return the configured default timezone as a string."""
      return current_app.config['TIMEZONE']
  
new_contents: """
  byceps.util.datetime.timezone
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  Timezone helpers
  
  :Copyright: 2006-2021 Jochen Kupperschmidt
  :License: Revised BSD (see `LICENSE` file for details)
  """
  
  from flask import current_app
  
  
  def get_timezone_string() -> str:
      """Return the configured default timezone as a string."""
      return current_app.config['TIMEZONE']
  
subject: Remove unused custom functions `local_tz_to_utc`, `utc_to_local_tz`