removed link to django-suit-rq

[guettli]

At the bottom of the README was a link to: https://github.com/coremke/django-suit-rq

this project was not updated since 2016.

I guess it makes sense to remove this link from the README

[codecov]

Codecov Report

Merging #474 (2c68ad4) into master (83f7e75) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #474   +/-   ##
=======================================
  Coverage   89.85%   89.85%           
=======================================
  Files          27       27           
  Lines        1646     1646           
=======================================
  Hits         1479     1479           
  Misses        167      167           

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[selwin]

Thanks!