Remove epiparameter from vignette and Remotes

[jamesmbaazam]

The CRAN policy does not allow any dependence on non-CRAN package. This PR removes epiparameter for this reason as it was used in one of the vignettes. When epiparameter goes on CRAN, we will revert to its usage.

This PR closes #84.

[codecov-commenter]

Codecov Report

Merging #88 (b718a10) into main (ee3ece3) will decrease coverage by 2.09%.
The diff coverage is n/a.

❗ Current head b718a10 differs from pull request most recent head 8e62c62. Consider uploading reports for the commit 8e62c62 to get more accurate results

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
- Coverage   96.25%   94.16%   -2.09%     
==========================================
  Files           5        5              
  Lines         240      240              
==========================================
- Hits          231      226       -5     
- Misses          9       14       +5     

see 1 file with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more