Merge: Remove six dependency (Drop Python 2.7 compatibility)

Remove six dependency (Drop Python 2.7 compatibility)

Author: insspb

flask_mongoengine/wtf/fields.py

@@ -5,7 +5,6 @@
 import sys
 from gettext import gettext as _
 
-import six
 from mongoengine.queryset import DoesNotExist
 from wtforms import widgets
 from wtforms.fields import SelectFieldBase, StringField, TextAreaField
@@ -204,7 +203,4 @@ class BinaryField(TextAreaField):
 
     def process_formdata(self, valuelist):
         if valuelist:
-            if six.PY3:
-                self.data = six.binary_type(valuelist[0], "utf-8")
-            else:
-                self.data = six.binary_type(valuelist[0])
+            self.data = bytes(valuelist[0], "utf-8")

requirements.txt

@@ -5,4 +5,3 @@ Flask-WTF>=0.14.3
 mongoengine>=0.20
 pymongo>=3.10.1
 flake8
-six

setup.py

@@ -50,7 +50,6 @@ def get_version(version_tuple):
         "WTForms[email]>=2.3.1",
         "Flask-WTF>=0.14.3",
         "mongoengine>=0.20",
-        "six",
     ],
     packages=["flask_mongoengine", "flask_mongoengine.wtf"],
     include_package_data=True,