Remove these unused config settings

We cleaned out the feature flag and code using these in
https://github.com/edx/edx-platform/pull/5707
but missed the config (I'll go get them in configuration.git later,
when I pull them out of the secure repos, which is where I found them).

lms/envs/aws.py

@@ -584,10 +584,6 @@ if 'DATADOG_API' in AUTH_TOKENS:
 ANALYTICS_SERVER_URL = ENV_TOKENS.get("ANALYTICS_SERVER_URL")
 ANALYTICS_API_KEY = AUTH_TOKENS.get("ANALYTICS_API_KEY", "")
 
-# Analytics data source
-ANALYTICS_DATA_URL = ENV_TOKENS.get("ANALYTICS_DATA_URL", ANALYTICS_DATA_URL)
-ANALYTICS_DATA_TOKEN = AUTH_TOKENS.get("ANALYTICS_DATA_TOKEN", ANALYTICS_DATA_TOKEN)
-
 # Analytics Dashboard
 ANALYTICS_DASHBOARD_URL = ENV_TOKENS.get("ANALYTICS_DASHBOARD_URL", ANALYTICS_DASHBOARD_URL)
 ANALYTICS_DASHBOARD_NAME = ENV_TOKENS.get("ANALYTICS_DASHBOARD_NAME", PLATFORM_NAME + " Insights")

lms/envs/common.py

@@ -2846,9 +2846,7 @@ ADVANCED_SECURITY_CONFIG = {}
 SHIBBOLETH_DOMAIN_PREFIX = 'shib:'
 OPENID_DOMAIN_PREFIX = 'openid:'
 
-### Analytics Data API + Dashboard (Insights) settings
-ANALYTICS_DATA_URL = ""
-ANALYTICS_DATA_TOKEN = ""
+### Analytics Dashboard (Insights) settings
 ANALYTICS_DASHBOARD_URL = ""
 ANALYTICS_DASHBOARD_NAME = PLATFORM_NAME + " Insights"