How do I remove all \r\n from a file, but preserve \n

I have a CSV with unix line endings, but some of the string values have windows line endings in them: date,notes\n 2014-01-01,"Blah Blah Blah"\n 2014-01-02,"Two things:\r\n - first thing\r\n - second thing\n 2014-01-03,"Foo"\n Note that \n and \r just show where the non-printable characters are in the file, it's not how it would look if you opened it in a text editor. **I want to remove instances of \r\n, but keep the actual line endings, where it's just \n.** The output should look like: date,notes\n 2014-01-01,"Blah Blah Blah"\n 2014-01-02,"Two things: - first thing - second thing\n 2014-01-03,"Foo"\n I need something like tr -d '\r\n' file.csv but where it deletes the string \r\n, rather than either \r or \n. If I try to process it with sed it's treated like so when processing line-by-line, so it doesn't really work: date,notes 2014-01-01,"Blah Blah Blah" 2014-01-02,"Two things:\r - first thing\r - second thing 2014-01-03,"Foo"