refine code style

core/stores/cache/cachenode.go

@@ -175,11 +175,11 @@ func (c cacheNode) doTake(v interface{}, key string, query func(v interface{}) e
 	}
 	if fresh {
 		return nil
-	} else {
+	}
+
 	// got the result from previous ongoing query
 	c.stat.IncrementTotal()
 	c.stat.IncrementHit()
-	}
 
 	return jsonx.Unmarshal(val.([]byte), v)
 }