[w3c/webauthn] 46d1fd: Remove now unused image file

  Branch: refs/heads/authenticator-taxonomy
  Home:   https://github.com/w3c/webauthn
  Commit: 46d1fd96ade2e7af5c0f2033a1187f35a7d6e176
      https://github.com/w3c/webauthn/commit/46d1fd96ade2e7af5c0f2033a1187f35a7d6e176
  Author: Emil Lundberg <emil@yubico.com>
  Date:   2018-07-02 (Mon, 02 Jul 2018)

  Changed paths:
    R images/authenticator-taxonomy.svg

  Log Message:
  -----------
  Remove now unused image file



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