Remove flags not included in ReadTheDocs from usage

[LuciMoore]

A short summary of what you would like to see in BIBSnet.

I removed the flags that I don't think are needed from the usage in the online documentation, but am waiting to remove them from the code base until I get confirmation from the team

Do you have any interest in helping implement the feature?

Yes!

Add any additional information or context about the request here.

No response