Merge #3990

3990: Removed unnecessary borrow call that failed nightly tests r=irevoire a=JannisK89

# Pull Request

## Related issue
Fixes #3988

## What does this PR do?
- Removes unnecessary borrow call that was causing warnings when running tests on nightly.

## PR checklist
Please check if your PR fulfills the following requirements:
- [ x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [ x] Have you read the contributing guidelines?
- [ x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!

Please let me know if there is anything else I can do to improve this PR.
Thank you.

Co-authored-by: JannisK89 <jannis.karanikis@gmail.com>

meilisearch-types/src/document_formats.rs

@@ -1,4 +1,3 @@
-use std::borrow::Borrow;
 use std::fmt::{self, Debug, Display};
 use std::fs::File;
 use std::io::{self, Seek, Write};
@@ -42,7 +41,7 @@ impl Display for DocumentFormatError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Self::Io(e) => write!(f, "{e}"),
-            Self::MalformedPayload(me, b) => match me.borrow() {
+            Self::MalformedPayload(me, b) => match me {
                 Error::Json(se) => {
                     let mut message = match se.classify() {
                         Category::Data => {