Issue 1039 remove cohort relationships

[azimov]

User testing apprecieated - to do this install the development versions:

remotes::install_github('OHDSI/CohortDiagnostics', ref = "issue_1039_remove_cohort_relationships")
remotes::install_github('OHDSI/OhdsiShinyModules', ref = "overlap-network-vis")

You will need to create a test dataset (or better, try migrating an existing result set!) to use the overlap tab.

[codecov]

Codecov Report

Attention: Patch coverage is 98.61111% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.45%. Comparing base (09bde2d) to head (7b48711).
Report is 344 commits behind head on develop.

Files with missing lines	Patch %	Lines
R/RunDiagnostics.R	98.57%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1156      +/-   ##
===========================================
+ Coverage    82.07%   88.45%   +6.37%     
===========================================
  Files           16       18       +2     
  Lines         3281     3448     +167     
===========================================
+ Hits          2693     3050     +357     
+ Misses         588      398     -190     

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