mdl_docs_with_common_files: Find documents with duplicated files
In zeehio/mendeleyr: Mendeley API for R

If a two documents have the same file, we consider that one of them is duplicated. It's better to review manually the entries.

1	mdl_docs_with_common_files(token, group_name = NULL, group_id = NULL)

`token`	A Token given by `mdl_token()` that provides access to your account.
`group_name`	A group name. Read group IDs through `mdl_groups()`
`group_id`	A group ID. Read group IDs through `mdl_groups()`

## Not run: 
token <- mdl_token()
docs <- mdl_docs_with_common_files(token, group_name = "mygroup")
View(docs$remove)
mdl_delete_document(token, docs$remove$document_id)

## End(Not run)