Remove unnecessary dependencies

Pipfile

@@ -6,7 +6,6 @@ verify_ssl = true
 [dev-packages]
 httpie = "*"
 flake8 = "*"
-django-rest-swagger = "*"
 coverage = "*"
 django-nose = "*"
 
@@ -23,7 +22,8 @@ channels = "*"
 channels-redis = "*"
 celery = {extras = ["redis"],version = "*"}
 django-celery-beat = "*"
-psycopg2 = "*"
+gunicorn = "*"
+psycopg2-binary = "*"
 
 [requires]
 python_version = "3.6"