Revert "Replace # with _ in m3u playlists."

This reverts commit 124032041f286a52d35335f26d5d3e7330300042.

Changing the name in the palylist without changing the file name doesn't
help. 🤦

download-yt-feeds

@@ -78,7 +78,7 @@ function main()
         [[ "${file}" =~ "\.vtt$" ]] && continue # Skip subtitle files.
         # https://stackoverflow.com/a/8811800/5965450
         if [[ "${files_before#*${file}}" == "${files_before}" ]]; then
-            echo "${file/${download_dir}\//}" | sed 's/#/_/g' \
+            echo "${file/${download_dir}\//}" \
                  >> "${download_dir}/New_${time}.m3u"
         fi
     done <<<"${files_after}"