Merge #7262

7262: Don't show internal server error on rename r=matklad a=matklad

bors r+
🤖

Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>

crates/ide/src/references/rename.rs

@@ -1,7 +1,6 @@
 //! FIXME: write short doc here
 use std::{
     convert::TryInto,
-    error::Error,
     fmt::{self, Display},
 };
 
@@ -35,8 +34,6 @@ impl fmt::Display for RenameError {
     }
 }
 
-impl Error for RenameError {}
-
 macro_rules! format_err {
     ($fmt:expr) => {RenameError(format!($fmt))};
     ($fmt:expr, $($arg:tt)+) => {RenameError(format!($fmt, $($arg)+))}