ci: try to fix codecov upload

Author: MilesCranmer

.github/workflows/CI.yml

@@ -38,7 +38,6 @@ jobs:
           julia --color=yes coverage.jl
       - uses: codecov/codecov-action@v5
         with:
-          token: ${{ secrets.CODECOV_TOKEN }}
           files: lcov.info
 
   docs: