In Marathon 1.8.0, it is no longer allowed for standby instance is to proxy the response for /v2/events. It is time to remove all conditions, parameters, etc. pertaining to the deprecated flag. (We keep the deprecated flag itself around, so that if users upgrade and forget to remove the deprecated flag, they can see a nice error message).
The deprecated feature flag is not removed
Search the code base for "proxyEvents"; remove all mentions, parameters, etc. (excepting change log and DeprecatedFeatures).