
  -spec unalias(Alias) -> boolean() when Alias :: reference().

Since:
  OTP 24.0

  Deactivate the alias Alias previously created by the calling
  process. An alias can for example be created via alias/0, or 
  monitor/3. unalias/1 will always deactivate the alias
  regardless of options used when creating the alias.

  Returns true if Alias was a currently active alias for current
  processes; otherwise, false.

  For more information on process aliases see the Process Aliases
  section of the Erlang Reference Manual.
