docs(syslog): remove the unused property name

[jujiale]

Description

in pr #5763 , the syslog property name have been deleted, but in doc, it exists, so we should delete it.

Fixes # (issue)

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[moonming]

@jujiale good catch👍

[kayx23]

In my past tests with other logger plugins, the name is actually configurable and gets exported to prometheus apisix_batch_process_entries metric.

https://github.com/search?q=repo%3Aapache%2Fapisix+sys-logger&type=code

You can change "name": "sys-logger" to a different value and see if test will pass, to verify if the field is actually configurable.

[jujiale]

In my past tests with other logger plugins, the name is actually configurable and gets exported to prometheus apisix_batch_process_entries metric.

https://github.com/search?q=repo%3Aapache%2Fapisix+sys-logger&type=code

You can change "name": "sys-logger" to a different value and see if test will pass, to verify if the field is actually configurable.

I checked it. it's my negligence, I have created a new pr to revert it. thanks a lot