fix WEEKS_SUB

Author: DongLiang-0

Diff for: docs/sql-manual/sql-functions/scalar-functions/date-time-functions/weeks-sub.md

@@ -34,7 +34,6 @@ WEEKS_SUB(<date_value>, <week_period>)
 ```
 
 ## Required parameters
-## 必选参数
 | Parameter       | Description                                                                                         |
 |-----------------|-----------------------------------------------------------------------------------------------------|
 | `date_value`    | `DATE` or `DATETIME` type input value.                                                              |

Diff for: versioned_docs/version-2.1/sql-manual/sql-functions/scalar-functions/date-time-functions/weeks-sub.md

@@ -34,7 +34,6 @@ WEEKS_SUB(<date_value>, <week_period>)
 ```
 
 ## Required parameters
-## 必选参数
 | Parameter       | Description                                                                                         |
 |-----------------|-----------------------------------------------------------------------------------------------------|
 | `date_value`    | `DATE` or `DATETIME` type input value.                                                              |

Diff for: versioned_docs/version-3.0/sql-manual/sql-functions/scalar-functions/date-time-functions/weeks-sub.md

@@ -34,7 +34,6 @@ WEEKS_SUB(<date_value>, <week_period>)
 ```
 
 ## Required parameters
-## 必选参数
 | Parameter       | Description                                                                                         |
 |-----------------|-----------------------------------------------------------------------------------------------------|
 | `date_value`    | `DATE` or `DATETIME` type input value.                                                              |