Syntax:  DELETE PLACEHOLDER placeholder_name_wild language_name_wild

  Deletes the definition of one or more placeholders associated with
  the specified language.

  Wildcards are accepted for both placeholder and language names.  If
  you do not specify a placeholder or language name, LSE uses the
  current placeholder and language.  If the placeholder you are
  deleting is the current placeholder, then the current placeholder
  element is set to UNSPECIFIED.  Otherwise, neither the current
  placeholder nor the current language are set as a result of this
  command.