docs: add delete file for android
MODIFY
commands-yml/commands/mobile-command.yml
commands-yml/commands/mobile-command.yml
| mobile: listSms | Get the list of SMS messages as [JSON format](https://github.com/appium/io.appium.settings#sms). | <none> | <none> |
| mobile:type | Send Unicode text to a focused element. | `{text}` | `{text: "happy testing"}` |
| mobile:getDeviceTime | Get time of the device under test. https://momentjs.com/docs/ is the full list of supported datetime format. Defaults to `YYYY-MM-DDTHH:mm:ssZ` which is ISO-8601. | `{format}` | `{format: 'YYYY-MM'}` |
+ | mobile:deleteFile | Delete a file on the device under test. The remote path value should be the full path or a file inside an application bundle. | `{remotePath}` | `{remotePath: '@io.appium.example/path/in/bundle'}`, `{remotePath: '/tmp/data/file'}` |
### Android (UiAutomator2 only)
| Command | Description | Argument | Argument Example |

docs: add delete file for android (#14243)