fix error wrt request source

Author: msistla96

go/internal/feast/server/http_server.go

@@ -284,8 +284,7 @@ func (s *httpServer) getOnlineFeatures(w http.ResponseWriter, r *http.Request) {
 			writeJSONError(w, errors.New("No entities specified in your request"), http.StatusBadRequest)
 			return
 		}
-		if request.RequestContext != nil || len(request.RequestContext) > 0 {
-			requestContextProto := make(map[string]*prototypes.RepeatedValue)
+		if request.RequestContext != nil && len(request.RequestContext) > 0 {
 			for key, value := range request.RequestContext {
 				if requestSourceType, ok := unifiedMap[key]; !ok {
 					logSpanContext.Error().Msgf("No request source type found for key %s", key)