Delete deprecated.R

[JanMarvin]

closes #135

[JanMarvin]

Codecov Report

Merging #136 (6525477) into main (21afb41) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
+ Coverage   63.60%   63.67%   +0.07%     
==========================================
  Files          38       37       -1     
  Lines        7155     7147       -8     
==========================================
  Hits         4551     4551              
+ Misses       2604     2596       -8     

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