[dovecot/core] df7ac4: remove mystery file that appears to be unused

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: df7ac49c9f7e41e8de009c72cfcccb1d6c8e0b2c
      https://github.com/dovecot/core/commit/df7ac49c9f7e41e8de009c72cfcccb1d6c8e0b2c
  Author: Josef 'Jeff' Sipek <jeff.sipek at dovecot.fi>
  Date:   2017-05-10 (Wed, 10 May 2017)

  Changed paths:
    R .inslog2

  Log Message:
  -----------
  remove mystery file that appears to be unused