Delete extra files from the 'gh-pages' branch on build.

[HarshKapadia2]

• This repo uses GitHub Actions and has a CI/CD process that builds the web site from the master branch and pushes all the built files to the gh-pages branch from where GitHub Pages deploys the site.
  • Check ./.github/workflows/build-website.yml for the exact working of the CI/CD process.
• If files are renamed in the master branch and the CI/CD process is run, the original file and the new renamed file are both found in the gh-pages branch.
• The problem to be solved is that the original file should not be present in the gh-pages branch after the CI/CD process runs.
• One solution could be to delete all the files in the gh-pages branch before the newly built files are pushed into the branch.
• Please note that, I do not want the entire gh-pages branch to be deleted and created every time the CI/CD process runs, as I want to have a history of the previous versions of the site.
• Do let me know if you have any other solution in mind.

[HarshKapadia2]

Issue still persists locally, but is solved for GitHub Actions.