Remove ConfirmMobileNumberForm

It’s exactly the same code as `TwoFactorForm` was.

app/main/forms.py

@@ -493,19 +493,6 @@ class ChangeMobileNumberForm(StripWhitespaceForm):
     mobile_number = international_phone_number()
 
 
-class ConfirmMobileNumberForm(StripWhitespaceForm):
-    def __init__(self, validate_code_func, *args, **kwargs):
-        self.validate_code_func = validate_code_func
-        super(ConfirmMobileNumberForm, self).__init__(*args, **kwargs)
-
-    sms_code = sms_code()
-
-    def validate_sms_code(self, field):
-        is_valid, msg = self.validate_code_func(field.data)
-        if not is_valid:
-            raise ValidationError(msg)
-
-
 class ChooseTimeForm(StripWhitespaceForm):
 
     def __init__(self, *args, **kwargs):

app/main/views/user_profile.py

@@ -18,8 +18,8 @@ from app.main.forms import (
     ChangeMobileNumberForm,
     ChangeNameForm,
     ChangePasswordForm,
-    ConfirmMobileNumberForm,
     ConfirmPasswordForm,
+    TwoFactorForm,
 )
 from app.utils import is_gov_user
 
@@ -169,7 +169,7 @@ def user_profile_mobile_number_confirm():
     if NEW_MOBILE_PASSWORD_CONFIRMED not in session:
         return redirect(url_for('.user_profile_mobile_number'))
 
-    form = ConfirmMobileNumberForm(_check_code)
+    form = TwoFactorForm(_check_code)
 
     if form.validate_on_submit():
         user = user_api_client.get_user(current_user.id)