[typo](docs) Delete invalid streaming hint. (#20929)

docs/en/docs/sql-manual/sql-reference/Data-Manipulation-Statements/Manipulation/INSERT.md

@@ -110,9 +110,6 @@ INSERT INTO test PARTITION(p1, p2) WITH LABEL `label1` SELECT * FROM test2;
 INSERT INTO test WITH LABEL `label1` (c1, c2) SELECT * from test2;
 ````
 
-Asynchronous import is actually a synchronous import encapsulated into asynchronous. Filling in streaming and not filling in **execution efficiency is the same**.
-
-Since the previous import methods of Doris are all asynchronous import methods, in order to be compatible with the old usage habits, the `INSERT` statement without streaming will still return a label. Users need to view the `label` import job through the `SHOW LOAD` command. state.
 
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docs/zh-CN/docs/sql-manual/sql-reference/Data-Manipulation-Statements/Manipulation/INSERT.md

@@ -110,9 +110,6 @@ INSERT INTO test PARTITION(p1, p2) WITH LABEL `label1` SELECT * FROM test2;
 INSERT INTO test WITH LABEL `label1` (c1, c2) SELECT * from test2;
 ```
 
-异步的导入其实是，一个同步的导入封装成了异步。填写 streaming 和不填写的**执行效率是一样**的。
-
-由于Doris之前的导入方式都是异步导入方式，为了兼容旧有的使用习惯，不加 streaming 的 `INSERT` 语句依旧会返回一个 label，用户需要通过`SHOW LOAD`命令查看此`label`导入作业的状态。
 
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