type annotation problem for regex

[juncaofish]

could you please remove the type annotation for variable:

email_pattern: regex.regex.Pattern = regex.compile(email_pstr, re.IGNORECASE)

it has conflicts with former version like: [regex](https://pypi.python.org/pypi/regex)==2018.11.22

and also I don't know why it need the annotation here.

[mingruimingrui]

This is a good catch! Merged!