docs: update file.delete function docs

docs/reference/model/file.md

@@ -50,7 +50,7 @@ Create a new directory at the specified path if it doesn't already exist.
 
 ## delete
 
-`delete(directory: str, exists)`
+`delete(directory: str)`
 
 Delete a file or an empty directory at the specified path.
 

i18n/zh-CN/docusaurus-plugin-content-docs/current/reference/model/file.md

@@ -50,7 +50,7 @@ weight: 100
 
 ## delete
 
-`delete(directory: str, exists)`
+`delete(directory: str)`
 
 在指定路径上删除一个文件或空目录。
 

i18n/zh-CN/docusaurus-plugin-content-docs/version-0.8/reference/model/file.md

@@ -50,7 +50,7 @@ weight: 100
 
 ## delete
 
-`delete(directory: str, exists)`
+`delete(directory: str)`
 
 在指定路径上删除一个文件或空目录。
 

versioned_docs/version-0.8/reference/model/file.md

@@ -50,7 +50,7 @@ Create a new directory at the specified path if it doesn't already exist.
 
 ## delete
 
-`delete(directory: str, exists)`
+`delete(directory: str)`
 
 Delete a file or an empty directory at the specified path.