Drop django-countries dependency, it is not needed when we have a list country names ourselves

 - Legacy-Id: 13145

Author: OleLaursen

requirements.txt

@@ -9,7 +9,6 @@ decorator>=3.4.0
 defusedxml>=0.4.1		# for TastyPie when ussing xml; not a declared dependency
 Django>=1.8.16,<1.9
 django-bootstrap3>=5.1.1,<7.0.0 # django-bootstrap 7.0 requires django 1.8
-django-countries>=4.0
 django-formtools>=1.0		# instead of django.contrib.formtools in 1.8
 django-markup>=1.1
 django-tastypie>=0.13.1