Refactor this bash function:
- currently it makes $statsInfo array via reading $statsFile, then loops through it to add the values to the index file.
- refactor to not use the $statsInfo array, just read $statsFile directly and output the values directly into the index file.
- The function should still take the same parameters and produce the same output.

Code:

function addModelToIndexFile {
    responseWords=$(wc -w < "$modelFile" | awk '{print $1}')
    responseBytes=$(wc -c < "$modelFile" | awk '{print $1}')

    # parse the stats file into an array, splitting on : character, getting the second part of each line
    statsInfo=()
    while read -r line; do
      value=$(echo "$line" | cut -d ':' -f2)
      statsInfo+=("$value")
    done < "$statsFile"

    (
        echo "<tr><td class='left'><a href='./$model.html'>$model</a></td><td >$responseWords</td><td>${responseBytes}</td>"
        for value in "${statsInfo[@]}"; do
            if [[ -n "$value" ]]; then
              echo "<td>${value}</td>";
            fi
        done
        echo "</tr>"
    ) >> "$indexFile"
}