refactor: Remove unused parameter and return value from build_body_file(…) (#6369)

2 simple refactoring commits that remove some unused code.

src/mimefactory.rs

@@ -1369,7 +1369,7 @@ impl MimeFactory {
 
         // add attachment part
         if msg.viewtype.has_file() {
-            let (file_part, _) = build_body_file(context, &msg, "").await?;
+            let file_part = build_body_file(context, &msg).await?;
             parts.push(file_part);
         }
 
@@ -1509,11 +1509,7 @@ pub(crate) fn wrapped_base64_encode(buf: &[u8]) -> String {
         .join("\r\n")
 }
 
-async fn build_body_file(
+async fn build_body_file(context: &Context, msg: &Message) -> Result<PartBuilder> {
-    context: &Context,
-    msg: &Message,
-    base_name: &str,
-) -> Result<(PartBuilder, String)> {
     let blob = msg
         .param
         .get_blob(Param::File, context)
@@ -1539,17 +1535,13 @@ async fn build_body_file(
         ),
         Viewtype::Image | Viewtype::Gif => format!(
             "image_{}.{}",
-            if base_name.is_empty() {
             chrono::Utc
                 .timestamp_opt(msg.timestamp_sort, 0)
                 .single()
                 .map_or_else(
                     || "YY-mm-dd_hh:mm:ss".to_string(),
                     |ts| ts.format("%Y-%m-%d_%H-%M-%S").to_string(),
-                    )
+                ),
-            } else {
-                base_name.to_string()
-            },
             &suffix,
         ),
         Viewtype::Video => format!(
@@ -1601,7 +1593,7 @@ async fn build_body_file(
         .header(("Content-Transfer-Encoding", "base64"))
         .body(encoded_body);
 
-    Ok((mail, filename_to_send))
+    Ok(mail)
 }
 
 async fn build_avatar_file(context: &Context, path: &str) -> Result<String> {