remove double referencing

Reasons:
- The compiler will immediately dereference the referenced reference.

Signed-off-by: Perma Alesheikh <me@prma.dev>

src/email/envelope/command/watch.rs

@@ -82,6 +82,6 @@ impl WatchEnvelopesCommand {
             "Start watching folder {folder} for envelopes changes…"
         ))?;
 
-        backend.watch_envelopes(&folder).await
+        backend.watch_envelopes(folder).await
     }
 }

src/email/message/attachment/command/download.rs

@@ -88,7 +88,7 @@ impl AttachmentDownloadCommand {
         )
         .await?;
 
-        let emails = backend.get_messages(&folder, ids).await?;
+        let emails = backend.get_messages(folder, ids).await?;
 
         let mut emails_count = 0;
         let mut attachments_count = 0;

src/email/message/command/read.rs

@@ -136,9 +136,9 @@ impl MessageReadCommand {
         .await?;
 
         let emails = if self.preview {
-            backend.peek_messages(&folder, &ids).await
+            backend.peek_messages(folder, ids).await
         } else {
-            backend.get_messages(&folder, &ids).await
+            backend.get_messages(folder, ids).await
         }?;
 
         let mut glue = "";

src/folder/command/create.rs

@@ -72,7 +72,7 @@ impl AddFolderCommand {
         )
         .await?;
 
-        backend.add_folder(&folder).await?;
+        backend.add_folder(folder).await?;
 
         printer.print(format!("Folder {folder} successfully created!"))
     }

src/folder/command/delete.rs

@@ -87,7 +87,7 @@ impl FolderDeleteCommand {
         )
         .await?;
 
-        backend.delete_folder(&folder).await?;
+        backend.delete_folder(folder).await?;
 
         printer.print(format!("Folder {folder} successfully deleted!"))
     }

src/folder/command/expunge.rs

@@ -76,7 +76,7 @@ impl FolderExpungeCommand {
         )
         .await?;
 
-        backend.expunge_folder(&folder).await?;
+        backend.expunge_folder(folder).await?;
 
         printer.print(format!("Folder {folder} successfully expunged!"))
     }

src/folder/command/purge.rs

@@ -86,7 +86,7 @@ impl FolderPurgeCommand {
         )
         .await?;
 
-        backend.purge_folder(&folder).await?;
+        backend.purge_folder(folder).await?;
 
         printer.print(format!("Folder {folder} successfully purged!"))
     }