Remove the check for provider URIs to allow dynamic provider configs (#57)

Author: fin-ger

mimir/api_client.go

@@ -51,10 +51,6 @@ type apiClient struct {
 
 // Make a new api client for RESTful calls
 func NewAPIClient(opt *apiClientOpt) (*apiClient, error) {
-	if opt.uri == "" && opt.rulerURI == "" && opt.alertmanagerURI == "" && opt.distributorURI == "" {
-		return nil, fmt.Errorf("no provider URIs defined. Please set uri, or ruler_uri/alertmanager_uri/distributor_uri")
-	}
-
 	/* Remove any trailing slashes since we will append
 	   to this URL with our own root-prefixed location */
 	opt.uri = strings.TrimSuffix(opt.uri, "/")