message: ci: remove unused variable from `.circleci/env.sh`
  Since the `.circleci/get-commit-range.js` script is no longer
  used in `.circleci/env.sh`. This commit removes the now unused local
  variable to the script's path.
  PR Close
diff: # Variables
  readonly projectDir=$(realpath "$(dirname ${BASH_SOURCE[0]})/..")
  readonly envHelpersPath="$projectDir/.circleci/env-helpers.inc.sh";
  -readonly getCommitRangePath="$projectDir/.circleci/get-commit-range.js";
  # Load helpers and make them available everywhere (through `$BASH_ENV`).
  source $envHelpersPath;
  