[Kst] [Kst-plot/kst] 51f4b9: Remove faulty assert

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 51f4b9be852983a51d7750d14ef1c1a5fcfad4e8
      https://github.com/Kst-plot/kst/commit/51f4b9be852983a51d7750d14ef1c1a5fcfad4e8
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2014-03-24 (Mon, 24 Mar 2014)

  Changed paths:
    M src/datasources/ascii/asciisource.cpp

  Log Message:
  -----------
  Remove faulty assert

This assert is (and should be) false if changing the updateType
of a file that has never been configured before.

So remove the assert.