tr -d or sed -e 's/\r//g' can't remove CRLF from file in MINGW32

Question

i have this CERTIFICATE file

-----BEGIN CERTIFICATE REQUEST-----
MIIFIDCCAwgCAQAwIDEeMBwGA1UEAwwVdmF1bHQudmF1bHQtcGVyc28uc3ZjMIIC
IjANBgkqhkiG9w0BAQEFAAOCAg8AMII