rPackages.covidsymptom: fix build

As of May 2024, there will be no more data updates.
https://github.com/hugofitipaldi/covidsymptom/?tab=readme-ov-file#update-data

The data included in the package are final, so I removed the update
script, which was breaking the nix build.

Co-authored-by: Justin Bedő <cu@cua0.org>

pkgs/development/r-modules/default.nix

@@ -1411,6 +1411,10 @@ let
       ];
     });
 
+    covidsymptom = old.covidsymptom.overrideAttrs (attrs: {
+      preConfigure = "rm R/covidsymptomdata.R";
+    });
+
     cubature = old.cubature.overrideAttrs (attrs: {
       enableParallelBuilding = false;
     });