#!/bin/bash

urls_filename='urls.txt'

cat $urls_filename | while read line; do
  filename=$(echo $line | awk -F, '{print $1}')

  if [ -f "$filename" ]; then
    continue
  fi

  if [ "$filename" == "." ]; then
    continue
  fi

  echo "$filename does not exist"

  sed -i "/$filename/d" "$urls_filename"
done