Remove unused setting IMPORT_EXTERNAL_DATA

It was last used in tastyapi.client which was last used in bf1a3d2c.

readthedocs/settings/base.py

@@ -270,8 +270,6 @@ ABSOLUTE_URL_OVERRIDES = {
 
 INTERNAL_IPS = ('127.0.0.1',)
 
-IMPORT_EXTERNAL_DATA = True
-
 backup_count = 1000
 maxBytes = 500 * 100 * 100
 if LOG_DEBUG:

readthedocs/settings/docker.py

@@ -34,7 +34,6 @@ WEBSOCKET_HOST = None
 
 HAYSTACK_CONNECTIONS = {'default': {}}
 
-IMPORT_EXTERNAL_DATA = False
 DONT_HIT_DB = True
 DONT_HIT_API = True
 NGINX_X_ACCEL_REDIRECT = True

readthedocs/settings/onebox.py

@@ -47,7 +47,6 @@ SLUMBER_API_HOST = 'http://localhost:8000'
 
 WEBSOCKET_HOST = 'localhost:8088'
 
-IMPORT_EXTERNAL_DATA = False
 DONT_HIT_DB = False
 #PRODUCTION_DOMAIN = 'readthedocs.org'
 #USE_SUBDOMAIN = True

readthedocs/settings/sqlite.py

@@ -38,7 +38,6 @@ HAYSTACK_CONNECTIONS = {
     },
 }
 
-IMPORT_EXTERNAL_DATA = False
 DONT_HIT_DB = False
 NGINX_X_ACCEL_REDIRECT = True