PPHA-478: Remove cough link due to clinical concerns

Author: Themitchell

lung_cancer_screening/questions/jinja2/_speak_to_a_gp_if.jinja

@@ -4,7 +4,7 @@
   <p>You have any of the following symptoms:</p>
 
   <ul class="nhsuk-list nhsuk-list--bullet" role="list">
-    <li>a <a href="https://www.nhs.uk/symptoms/cough/">cough</a> that does not go away after 3 weeks</li>
+    <li>a cough that does not go away after 3 weeks</li>
     <li>a long-standing cough that gets worse</li>
     <li><a href="https://www.nhs.uk/conditions/chest-infection/">chest infections</a> that keep coming back</li>
     <li><a href="https://www.nhs.uk/symptoms/coughing-up-blood/">coughing up blood</a></li>