fix: GlobalDataSourceAspect删除切换至null

acupuncture-framework/src/main/java/com/acupuncture/framework/aspectj/AdminGlobalDataSourceAspect.java

@@ -54,8 +54,6 @@ public class AdminGlobalDataSourceAspect {
             String dataSourceKey = getDataSource(point);
             if (StringUtils.isNotEmpty(dataSourceKey)) {
                 DataSourceManager.setDataSourceKey(dataSourceKey);
-            } else {
-                DataSourceManager.setDataSourceKey(null);
             }
         }catch (Exception e){
             throw new BaseException(StrUtil.format("获取数据源错误：{}", e));