old_contents: """Configuration of database connections"""
  from mara_db import dbs
  import typing
  
  
  def databases() -> {str: dbs.DB}:
      """The list of database connections to use, by alias"""
      return {'mara': dbs.PostgreSQLDB(host='localhost', database='mara', user='root')}
  
  
  def mara_db_alias() -> str:
      """The database alias for mara internal data"""
      return 'mara'
  
  
  def default_timezone() -> str:
      """
      The default timezone to be used for database connections
      See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
      """
      return 'Europe/Berlin'
  
  
  def schema_ui_foreign_key_column_regex() -> typing.Pattern:
      """A regex that classifies a table column as being used in a foreign constraint (for coloring missing constraints)"""
      return r'.*_fk$'
new_contents: """Configuration of database connections"""
  from mara_db import dbs
  import typing
  
  
  def databases() -> {str: dbs.DB}:
      """The list of database connections to use, by alias"""
      return {'mara': dbs.PostgreSQLDB(host='localhost', database='mara', user='root')}
  
  
  def default_timezone() -> str:
      """
      The default timezone to be used for database connections
      See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
      """
      return 'Europe/Berlin'
  
  
  def schema_ui_foreign_key_column_regex() -> typing.Pattern:
      """A regex that classifies a table column as being used in a foreign constraint (for coloring missing constraints)"""
      return r'.*_fk$'
subject: Remove config.mara_db_alias function